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CELLS
Term | Definition |
---|---|
cell | the basic unit of structure and function in living things |
organelle | A tiny cell structure that carries out a specific function within the cell. |
cell wall | A rigid layer of nonliving material that surrounds the cells of plants and some other organisms. |
cell membrane | A cell structure that controls which substances can enter or leave the cell. |
nucleus | A cell structure that contains nucleic acids, the chemical instructions that direct all the cell’s activities. |
cytoplasm | The region between the cell membrane and the nucleus; in organisms without a nucleus, the region located inside the cell membrane |
mitochondria | Rod-shaped cell structures that convert energy in food molecules to energy the cell can use to carry out its functions. |
endoplasmic reticulum | A cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another. |
ribosome | A small grain-like structure in the cytoplasm of a cell where proteins are made. |
Golgi body | A structure in a cell that receives proteins and other newly formed materials from the endoplasmic reticulum, packages them, and distributes them to other parts of the cell. |
chloroplast | A structure in the cells of plants and some other organisms that captures energy from sunlight and uses it to produce food. |
vacuole | A sac inside a cell that acts as a storage area. |
lysosome | A small, round cell structure containing chemicals that break down large food particles into smaller ones. |
microscope | An instrument that makes small objects look larger |