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Cell Structures
Cells
| Cell Membrane | The semipermeable membrane surrounding the cytoplasm of a cell. |
| cell wall | a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants, it consists mainly of cellulose. |
| vacuole | a space or vesicle within the cytoplasm of a cell, enclosed by a membrane and typically containing fluid. a small cavity or space in tissue, especially in nervous tissue as the result of disease. |
| choloroplast | (in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place. |
| mitochondria | an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae). |
| endoplasmic reticulum | a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis. |
| nucleus | the central and most important part of an object, movement, or group, forming the basis for its activity and growth. "the nucleus of a film-producing industry" synonyms: core, center, central part, heart, nub, hub, middle, eye, focus, focal point, pivot |
| nucleolus | a small dense spherical structure in the nucleus of a cell during interphase. |
| lysosome | an organelle in the cytoplasm of eukaryotic cells containing degradative enzymes enclosed in a membrane. |
| cytoplasm | the material or protoplasm within a living cell, excluding the nucleus |
| ribsome | a minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells. They bind messenger RNA and transfer RNA to synthesize polypeptides and proteins. |
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brjoiner018
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