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Cell Structures
Cell structures & functions
Term | Definition |
---|---|
Cell Wall | Tough, rigid outer support that protects plant cells |
Cytoplasm | The gelatin-like substance inside all cells where chemical reactions take place |
Nucleus | The organelle that directs all of the cell’s activities |
Nucleolus | The membrane-bound object inside the nucleus where ribosomes are made |
Mitochondria | The “powerhouse” where food is broken down to release energy |
Rough Endoplasmic Reticulum | Folded membranes with ribosomes attached; transports proteins inside the cell |
Golgi bodies | The organelle that packages and delivers materials outside of the cell |
Vacuole | A storage sac for wastes and other substances |
Cell Membrane | The protective layer around the cell that allows materials to go in and out |
Cytoskeleton | The framework of fibers that supports the cell and gives it shape |
Nuclear membrane | The protective layer around the nucleus that allows materials to go in and out |
Chloroplast | A green organelle in plant cells where photosynthesis takes place |
Ribosomes | Small structures where proteins are made |
Smooth Endoplasmic Reticulum | Folded membranes with no ribosomes attached; makes cellular substances like lipids |
Lysosomes | “Suicide sacs” – organelles that contain digestive enzymes that break down food, cell wastes & worn out cell parts |
Central vacuole | A large storage sac in plant cells that holds water and minerals, and supports the cell |
Flagella | Long, hair-like projections that help a cell move |
Cilia | Small hairs on cells that trap particles & help a cell move |
Prokaryote | A unicellular organism with no nucleus or organelles. Ex. bacteria |
Eukaryote | Cells with a nucleus & organelles. Ex. plants, animals, fungi, & protists |
Chromosome | Structures in the nucleus which are made up of DNA; carries the instructions for life |
Vesicles | The packages put together by the Golgi bodies to send out of the cell. |
Centrioles | Structures in animal cells that have a role in mitosis |