Cell biology functions organelle organelles function animal eukaryotic cells structure structures science their each chart organisms college plant its mainOrganelles membrane definition rsscience organelle labeled chromosomes vacuole Organelles cell organelle markers. It often has a spherical or oval shape and is located in the middle of the cell. However, some organelles are specific to one particular type of cell-like plastids and cell. Plant cells, like all eukaryotic cells, contain a nucleus and other organelles, each with its distinct functions. Large plants and animals have many billions of cells. organelles: specialized intracellular structures; e. See more. Because they contain no DNA or ribosomes, however, they have to import their proteins from the cytosol. . Cytoskeleton. Definition. cell organelle - a specialized part of a cell; analogous to an organ; "the first organelle to be identified was the nucleus" cell organ, organelle. a group of similar cells and their products that carry out a specific function. [2] [3] The name organelle comes from the idea that these structures are to cells what an organ is to the body . ORGANELLES pronunciation • How to pronounce ORGANELLES. A single cell may be a complete organism in itself, such as a bacterium, or it may acquire a specialized function, becoming a building block of a multicellular organism. Commonly used organelles include lysosome, chloroplast and mitochondria. An organelle, by definition, is a membrane-bound compartment or structure in a cell that serves a specific purpose. The heaviest organelles (nuclei, chloroplasts) fall the to the bottom. C. often found in large numbers in a particular cell. Pronunciation of organelles. S. Learn more in the Cambridge English-Italian Dictionary. cells are the basic units of life and are similar in all living organisms, like bacteria, protozoans, other microbes, and plants and animals. Allele Definition. This is a complex photoreceptor that can focus images and is sensitive to light. A. Organelles are specialised parts of cells that carry out a specific function. ↔. organelles: specialized intracellular structures; e. Unlike animal cells, plant cells have a cell wall surrounding. Apart from encapsulating cell contents, the plasma membrane also plays a vital role in regulating the movement of substances in and out of the cell. Red Blood Cells Lesson for Kids 2:54. Animal cells do not have plant-specific organelles like cell walls, which support the plant cell, or. gənˈel/ US /ˌɔːr. I am confused now as to which is the correct definition. 12. Most of these organelles fall in the Mie regime, and exhibit highly anisotropic forward-directed scattering. Listen free audio with natural accents. Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins. Which of the following is a function of the central vacuole?Cuadernos para imprimir. intracellular: [adjective] existing, occurring, or functioning within a cell. There are three types of the disease. Ocellus aka ocelloid: This organelle occurs in the Warnowiaceae and consists of a hyalosome, a dorsally pigmented melanosome, and an ocelloid chamber. organelle ý nghĩa, định nghĩa, organelle là gì: 1. It is an organelle that contains several other sub. Other changes happen in response to challenges or stress and reflect a modification in organelle function, such as a change in protein. It determines cell shape and provides tensile strength, structural support and protection against osmotic. Cells The Inside Story CMSE. US English. Organelles. A commonly accepted definition of organelle is a membrane delimited structure with a specific cellular function. An organelle is a structure within the cytoplasm of a eukaryotic cell that is enclosed within a membrane and performs a specific job. [2] Keratinocytes form a barrier against environmental damage by heat, UV. They are microscopic. Definition and meaning can be found here: main difference between organ and organelle is that organ is a large part of an organism, composed of tissues which perform similar functions whereas organelle is a specialized structure found. It is involved in signal transduction between the cell membrane and the nucleus and organelles. 1-15 micrometers; Shape range: Spherical, rod-like, spiral, plates, irregularly shaped, lobed, needle-like filamentous,. The study of cells is. Dilcey. The 13 organelles and their functions are: 1. Miller. An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body. The term literally means “little organs. In cell biology, an organelle is a part of a cell that does a specific job. These compartments are usually isolated from the rest of the cytoplasm through intracellular membranes. Cell Organelles 10 Day Lesson Plan Ribosome Cell Biology. In the same way organs, such as the heart, liver, stomach, and kidneys, serve specific functions to keep an organism alive, organelles serve specific functions to keep a cell alive. However my teacher said this is wrong. Golgi Apparatus Definition. organelles vocabulary — db-excel. Organelles from cells. organite, organelle, Organite are the top translations of "organelle" into French. The eukaryotic cell has a nuclear membrane that surrounds the nucleus, in which the well-defined chromosomes (bodies containing the hereditary material) are located. There are two kinds of cells: prokaryotic and eukaryotic. , page 161: Like organelles within a. Prokaryotic cells are not as simple as once thought. Tissues. The meaning of ORGANELLE is a specialized cellular part (such as a mitochondrion, chloroplast, or nucleus) that has a specific function and is considered analogous to an organ. well definied, intracellular bodies that perform specific functions for the cell. Difficult (1 votes) Spell and check your pronunciation of fraaye. . NOTA: ya está disponible el cuaderno del profesor del curso 22 - 23. membrane, in biology, the thin layer that forms the outer boundary of a living cell or of an internal cell compartment. Expand your vocabulary, learn words. The nucleus is the most prominent organelle in the cell that you can see under a microscope. Autophagy (or autophagocytosis; from the Ancient Greek αὐτόφαγος, autóphagos, meaning "self-devouring" [1] and κύτος, kýtos, meaning "hollow") [2] is the natural, conserved degradation of the cell that removes unnecessary or dysfunctional components through a lysosome-dependent regulated mechanism. a pocket of embryonic tissue that is the beginning of an organ. Pronunciation of prabubuntoro. In the more complex eukaryotic cells, organelles are often enclosed by their own membrane. Organelles are specialized structures that perform various jobs inside cells. Constitutive exocytosis is important in transporting proteins like receptors that function in the plasma membrane. O rganelles have specialized cellular functions, just as your body’s organs have specialized functions. Nucleolus: Synthesis of ribosomal RNA. g. These characteristic distributions depend on interactions of the organelles with the cytoskeleton. Prokaryotic cells are small, simple, and lack membrane-bound organelles (including the. Organelles organelle cells worksheets eukaryotic membrane 99worksheets pogil kidsworksheetfun tk chessmuseum chapter molecular unmisravle punnett mathsCell organelles worksheet. The cell membrane is important in regulating cell shape and the selective transport of molecules in and out of the cell. 8. Most of the important activities of the cell occur in the cytoplasm. Found in multicellular organisms. Organelle definition: . Dilcey. g. Summary. ; Record yourself saying 'organelles' in full sentences, then watch yourself and listen. In plant cells, peroxisomes carry out additional functions, including the recycling of carbon from. Top 20 Mispronounced Words; Medical Terms; Words A-I. They're also the more complex of the two. 6. Cells are the little building blocks of life. Listen to the audio pronunciation in English. . Next, is the nucleus, one of the biggest organelle. Organelles act like mini-organs, each carrying out a different role in the cell, but all working. Eukaryotic cells organize their intracellular components into organelles that can be membrane-bound or membraneless. translation English dictionary definition of organelle n A differentiated structure within a cell such as a mitochondrion vacuole or chloroplast that performs a specific function n a structural and. In eukaryotes (i. Chloroplasts. Organelles in animal cells include the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, vesicles, and. e. organelle in American English. In simpler terms, a phospholipid bilayer is a film that consist of two layers of phospholipids, that covers. See examples of ORGANELLE used in a sentence. [3] It allows the orderly. Pronunciation of vromi. Among the more important cell organelles are the. Pronunciation of fraaye. Pronunciation GuideOrganelles functions labeled plastid plastids cytoplasm microbenotes. Eukaryotic cells are characterized by a membrane-bound nucleus. A large number of membraneless organelles, including nucleoli, Cajal bodies, P-bodies, and stress granules, exist as liquid droplets within the cell and arise from the condensation of cellular material in a process termed. The morphological distinction between the two is the presence of protein-synthesizing particles, called ribosomes, attached to the outer surface of the RER. Organelle Functions in Current Events Style Based off of a. A chloroplast is a type of plastid (a saclike organelle with a double membrane) that contains chlorophyll to absorb light energy. See examples of ORGANELLES used in a sentence. The glycosome is a membrane-enclosed organelle that contains the glycolytic enzymes. ”. Extateex . Learn more in the Cambridge English-Thai Dictionary. Break 'organelle' down into sounds: [AW] + [GUH] + [NEL] - say it out loud and exaggerate the sounds until you can consistently produce them. But, organs are macroscopic and can only be found in animals and plants. Samantha. Most are membrane-bound structures that are the sites of specific types. As the body is composed of various organs, the cell, too, has “little organs” that perform special functions. free vs. Due to its organelles, a cell carries out most physiological processes, like respiration, reproduction, and. well definied, intracellular bodies that perform specific functions for the cell. Last updated October 18, 2023. The name organelle comes from the idea that these structures are to cells what an organ is to the body. organelle翻譯：細胞器官，胞器（細胞中諸如細胞核、葉綠體等細胞組織，有其特定功能）。了解更多。Organelles serve specific functions within eukaryotes, such as energy production, photosynthesis, and membrane construction. The term organelle is derived from the word ‘organ’ and refers to compartments within the cell that perform a specific function. Molecules that pass muster with the cell membrane enter the cytoplasm, a mixture of macromolecules (such as proteins and RNA), small organic molecules (such as glucose), ions, and water. This is the British English pronunciation of organelle. Vocabulary cell biology file Cell organelle match biology vocab cards matching flash key definitions organelles science game answer pdf games included Biology buzz words: cell structure and. They typically are round to oval in shape. Organelles are microscopic structures inside of cells that perform specialized functions, a variety of which involve phosphate — an essential nutrient for metabolism, storing chemical energy and. [1] Basal cells in the basal layer ( stratum basale) of the skin are sometimes referred to as basal keratinocytes. The nucleus contains the DNA which. Ribosomes: Tiny structures where protein synthesis occurs. 1: Ribosomal subunit. Melanie Hussell Communication Coaching. Vesicle. Cell wall. ” The cell, like the rest of the body, is made up of numerous organs that execute specific activities. Definition. Cells are grouped into two different. Select Speaker Voice. An organelle is a biological structure that performs a distinctive function inside a cell. cytoplasm: [noun] the organized complex of inorganic and organic substances external to the nuclear membrane of a cell and including the cytosol and membrane-bound organelles (such as mitochondria or chloroplasts) — see cell illustration. 98. A lysosome ( / ˈlaɪsəˌsoʊm /) is a membrane-bound organelle found in many animal cells. The purpose. Pronunciation of organelles Freely permeable layer surrounding cell membrane. Learn how to pronounce CombinedThis is the *English* pronunciation of the word Combined. Definition: Organelle. These. Size: Prokaryotic cells:. fraaye pronunciation with translations, sentences, synonyms, meanings, antonyms, and more. [ or″gah-nel´] any of the organized cytoplasmic structures of distinctive morphology and function present in all eukaryotic cells, including such structures as the nucleus, mitochondria, lysosomes, peroxisomes, Golgi apparatus, and endoplasmic reticulum, as well as chloroplasts in plants and cilia and flagella in protozoa. This is the American English pronunciation of organelle. ribosomes, vacuoles ). a grouop of organs that accopmlish related tasks. A structure in the cells of plants and some other organisms that. nucleus cytoplasm cell membrane. Organelles that contains the enzymes for respiration, and where most energy is released in respiration. As such, microbiologists often use the term “amoeboid”, to refer to a specific type of movement and amoebae interchangeably. organelle - Translation to Spanish, pronunciation, and forum discussions. How do you say organelles, learn the pronunciation of organelles in PronounceHippo. Definition. Peroxisome. It is held together to the cytoplasm with the. cell organelle: ( or'găn-el ), One of the specialized parts of a protozoan or tissue cell; these subcellular units include mitochondria, the Golgi apparatus, nucleus and centrioles, granular and agranular endoplasmic reticulum, vacuoles, microsomes, lysosomes, plasma membrane, and certain fibrils, as well as plastids of plant cells. The nucleus itself is an organelle . A cell wall is the outermost layer of the eukaryotic cells. Here is a list of some common cell organelles and a brief explanation of their functions: 1. Learn how to say organelles in English. 5 to 2. See organelles meaning in Hindi, organelles definition, translation and meaning of organelles in Hindi. 7 μm), contain both actin and microtubules and can carry components of the cytoplasm between cells, such as vesicles and organelles. This protects the rest of the cell from the digestive enzymes inside the membrane. This means that prokaryotes do not have a nucleus; instead, they keep their DNA in a cell region called the nucleoid. The membrane is impervious to the acidic contents of the lysosome. A chloroplast is an organelle within the cells of plants and certain algae that is the site of photosynthesis, which is the process by which energy from the Sun is converted into chemical energy for growth. In most cells, for example, the Golgi apparatus is located close to the nucleus, whereas the network of ER tubules extends from the nucleus throughout the entire cytosol. List of Functions of Cell Organelles IvyRose Holistic. For example, the nucleus is the cell’s brain, and the mitochondria are the cell’s hearts. or· gan· elle ˌȯr-gə-ˈnel. organelle translations: organello. As the body is composed of various organs, the cell, too, has “little organs” that perform special functions. ; Record yourself saying 'organelle' in full sentences, then watch yourself and listen. Figure 1: A diagram showing the basic structure of a eukaryotic cell and prokaryotic cell. prokaryote: [noun] any of the typically unicellular microorganisms that lack a distinct nucleus and membrane-bound organelles and that are classified as a kingdom (Prokaryotae synonym Monera) or into two domains (Bacteria and Archaea) — compare archaea, bacterium, eukaryote. ) are surrounded by a phospholipid bilayer (membrane). Locus is the location where a gene is found on a chromosome. 98|119. They are so small that they can only be seen using an electron microscope. Organelles typically have their own plasma membrane round them. Flagella and cilia are the locomotory organs in a eukaryotic cell. us / ˌɔr·ɡəˈnel / Add to word list biology any of the parts inside a living cell that have a particular purpose, such as a nucleus (= central part) or a chloroplast (= part in a plant. Learn the definition of 'organelles'. Most plasma membranes are about 50 percent protein by weight, while the membranes of some metabolically active organelles are 75 percent protein. Tìm hiểu thêm. plastid: [noun] any of various cytoplasmic organelles (such as an amyloplast or chloroplast) of photosynthetic organisms (such as plants) that serve in many cases as centers of special metabolic activities (such as starch storage). They are membrane-bound compartments or structures of a cell in general. The organelles and cytosol, taken together, compose the cell’s cytoplasm. organelle. US English. Record yourself saying 'organelles' in full sentences, then watch yourself and listen. The. Amoeba Definition. 01. . Size range: 0. A brief treatment of enzymes follows. 2. Cell, in biology, the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. Organelle consisting of saccules and vesicle that processes, packages, and distributes molecules about or from the cell. PLEASE HELP Write a short story describing how these. plant cell, the basic unit of all plants. numerous membrane-bound organelles —such as the endoplasmic reticulum, Golgi apparatus, chloroplasts, mitochondria, and others. 7 million species are living on the planet. Vromi . Organelles. Definition of Nucleus This is a spherical structured organelle found majorly at the center of a cell surrounded by a double-layered nuclear membrane separating it from the cytoplasm. mitochondria. US English. Normal levels of thiamine, thiamine monophosphate,. The site of cellular respiration. The Golgi apparatus is made up of a series of flattened, stacked pouches called cisternae and is located in the cytoplasm near the cell nucleus. The cell wall of plant cells is made from cellulose. Definition and synonyms of organelle from the online English dictionary from Macmillan Education. Article Vocabulary Organelles are specialized structures that perform various jobs inside cells . This video shows you how to pronounce SpecialisedThis video shows you how to pronounce KinesinEvery organism, or living thing , is made up of structures called cells. organelle translate: 细胞器官，胞器（细胞中诸如细胞核、叶绿体等细胞组织，有其特定功能）. 1 5. : am(o)ebas or am(o)ebae / ə ˈ m iː b i /), often called an amoeboid, is a type of cell or unicellular organism with the ability to alter. Difficult (1 votes) Spell and check your pronunciation of divulges. Organelles in. It is named after Archibald Denis Leigh, a British neuropsychiatrist who first described the condition in 1951. Protects the cell, maintains its shape, and prevents too much up take of water. Organelles occur in all eukaryotes. 1 5. Size range: 0. The different parts of a cell, especially the ones that are separated. | Meaning, pronunciation, translations and examples Definition. Organelles. The nucleolus is also where ribosomal RNA genes are transcribed. mitochondria, lysosome, etc. Plant cell, fungal cell or. Unlike prokaryotic cells (bacteria), eukaryotic cells have numerous membrane-bound organelles. Think of an organelle as a level of organization between macromolecules and the cell. Organelle Definition. It means that, unlike prokaryotic cells, animal cells have membrane-bound organelles suspended in the cytoplasm enveloped by a plasma membrane. The term literally means “little organs. . Others bind to specific molecules on one side of a membrane and transport the molecules to the other side. The organelle has no basic shape or size; its structure varies according to the requirements of the cell. In a way, so do cells. . Animal Cell Definition “An animal cell is a type of eukaryotic cell that lacks a cell wall and has a true, membrane-bound nucleus along with other cellular organelles. The endoplasmic reticulum is a membranous organelle inside eukaryotic cells that is continuous with the nuclear envelope. They coordinate and function efficiently for the normal functioning of the cell. organelles. According to her, the correct definition is "The gelatinous liquid part of a cell excluding the nucleus is known as the cytoplasm". 1 2 3 4 5 6 7 8 9 Share No views 10 minutes ago #LearnEnglish #PronunciationGuide #Organelle Unlock the correct pronunciation of "organelle" with our comprehensive guide! Whether you're. The four primary types of locomotory organelles in protozoa are cilia, flagella, pseudopodia, and undulating membranes. The cell has mitochondria. 0. , cells having a nucleus ), the cytoplasm contains all of the organelles. In this video, we'll start by talking about the most superficial part of your skin, and that is the epidermis, and I'm sure your friends have told you before that your epidermis is showing. These cell organelles incorporate either membrane or non-membrane certain organelles, present within the cells, but their structure and function are different. Centrosome (Centrioles) Microvilli. Synonym of organelle··(cytology) organelle, organoid Synonyms: organellum, organoidHow to say adenosine triphosphate in English? Pronunciation of adenosine triphosphate with 14 audio pronunciations, 2 synonyms, 3 meanings, 18 translations, 5 sentences and more for adenosine triphosphate. Organelles are involved in many vital cell functions. Eukaryote definition: . This video shows you how to pronounce ClathrinFigure 5. 1 2 3 4 5 6 7 8 9 Share No views 10 minutes ago #LearnEnglish #PronunciationGuide #Organelle Unlock the correct pronunciation of "organelle" with our comprehensive. Learn how to say organelles in English. US /ˌɔːr. Small, membrane- bounded sac that stores substances within a cell. In cell biology, an organelle is a part of a cell that does a specific job. It also filters the molecules passing in and out of it. An artificial organelle is a distinct functional subunit or sub-compartment of an artificial cell. These are just folds in the inner membrane and. What’s found inside a cell. Definition and meaning can be found here:Pronunciation, , , , , , , 0, Organelle with Its Function - Bing Images | Cell organelles, Science, 842 x 1045, png, , 20, organelles. Figure 5. This is the British English pronunciation of organelle. There are many different types of cell organelles, and their specific functions can vary depending on the type of cell. Each organelle carries out a specific function in the cell. Exocytosis is the cellular process in which intracellular vesicles in the cytoplasm fuse with the plasma membrane and release or "secrete" their contents into the extracellular space. Protozoa use a variety of locomotion strategies depending on their environment and lifestyle. Definition. cytoplasm, the semifluid substance of a cell that is external to the nuclear membrane and internal to the cellular membrane, sometimes described as the nonnuclear content of protoplasm. often found in large numbers in a particular cell. Organelles are part of the cells. There are many types of organelles. Cytoskeleton The Cell. It is made up of several types of organelles that allow the cell to function and reproduce. or· gan· elle ˌȯr-gə-ˈnel. Organelles are membrane-bound compartments found inside of eukaryotic cells in the cytoplasm. Eukaryotic cells: Contain various membrane-bound organelles, including mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and more. gənˈel/ organelle /ɔː/ as in horse /g/ as in give /ən/ as in sudden /e/ as in head /l/ as in look US /ˌɔːr. 1 5. mitochondria and chloroplasts. : a specialized cellular part (such as a mitochondrion, chloroplast, or nucleus) that has a specific function and is considered analogous to an organ. The symbiotic theory proposes that the complex eukaryotic cell arose by a series of symbiotic events in which organisms of different lineages merged. Some organelles help in the motility of the cell or reproduction. Cell organelles are often enclosed by their own membranes, which divide the cell into many. How to pronounce reliable & reliability. groups of tissues that perform a particular job in an organism. 78. Organelles are involved in many vital cell functions. Examples of organelles include the nucleus, the endoplasmic reticulum, the Golgi, mitochondria. Organelles are dynamic, changing size and shape to maintain homeostasis and adjusting to the various needs of the cell. Cell Storybook Winston Salem Forsyth County Schools. However, they also contain some subcellular structures that are absent in animal cells, such as chloroplasts, a vacuole, and a cell wall. Rate the pronunciation struggling of Organelles. In cell biology, an organelle is a specialized subunit, usually within a cell, that has a specific function. 3 /5. 111. com | Online Language Dictionaries. Performs a specific process within the cell. An amoeba (/ ə ˈ m iː b ə /; less commonly spelled ameba or amœba; pl. premium features; rewards; pricing - single; pricing - family; pricing - organizations; connect. Hear more hard-to-say medical terms pronounced: Listen how to say this wo. Select Speaker Voice. Find the answer of what is the meaning of organelles in Hindi. Create your own Quiz. In the same way organs, such as the heart, liver, stomach, and kidneys, serve specific functions to keep an organism alive, organelles serve specific functions to keep a cell alive. Pronunciation of extateex. Definition. a discrete structure within a cell, as a chloroplast or centriole, characterized by having specialized functions, a usually distinctive chemical composition, and an identifying molecular structure. It is found in a few species of protozoa including the Kinetoplastida which include the suborders Trypanosomatida. in a sentence, look up the pronunciation first in a dictionary, then use are part of the body. Cytoplasm is responsible for giving a cell its shape. gənˈel/ organelle /ɔː/ as in horse /g/ as in give /ən/ as in sudden /e/ as in head /l/ as. [1] Most of the cell's organelles are in the cytoplasm. any of a group of particles in the cytoplasm of a living cell; they attach to mRNA and move down it one codon at a time and then stop until tRNA brings the required amino acid; when it reaches a stop codon it falls. This means that prokaryotes do not have a nucleus; instead, they keep their DNA in a cell region called the nucleoid. They typically are round to oval in shape. Check out the pronunciation, synonyms and grammar. You can think of cell organelles as a cell’s internal organs. 1-15 micrometers; Shape range: Spherical, rod-like, spiral, plates, irregularly shaped, lobed, needle-like filamentous,. Difficult (1 votes) Spell and check your pronunciation of organelles. Check out the pronunciation, synonyms and grammar. Both of them being prokaryotic life forms lack nuclei and membrane-bound cell organelles. Which plant cell organelle converts chemical fuel into packets of chemical energy that can power the cell? B. An organelle is a structure within the cytoplasm of a eukaryotic cell that is enclosed within a membrane and performs a specific job. Because a eukaryotic cell’s nucleus is surrounded by a membrane, it is. There are many types of organelles in. 2 /5. [3] It allows the orderly. . This video shows you How to Pronounce Organelles, pronunciation guide. 1981, William Irwin Thompson, The Time Falling Bodies Take to Light: Mythology, Sexuality and the Origins of Culture, London: Rider/Hutchinson & Co. The revolutionary but widely accepted definition was proposed by Thomas Cavalier-Smith in 1985 : the organelle exported, by endosymbiotic gene transfer (EGT), its genes to the host nucleus and imports their products from the host. They are involved in many processes, for example energy production, building proteins and secretions, destroying toxins, and responding to external signals. 6. It is the external covering of a cell where all different parts, including cytoplasm and nucleus, are enclosed. Here are 4 tips that should help you perfect your pronunciation of 'organelles':. Listen to the spoken audio pronunciation of "cell organelles", record your own pronunciation using microphone and then compare with the recorded pronunciation. Functionally, most bacterial. These are just folds in the inner membrane and. ”. They contain chlorophylls, and photosynthesis occurs within them, allowing plant cells to form sugar from air and water in the. peroxisome, membrane-bound organelle occurring in the cytoplasm of eukaryotic cells. In humans, they constitute 90% of epidermal skin cells. Select Speaker Voice. Organelle, any of the specialized structures within a cell that perform a specific function (e.