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BMMS Life Sci Chpt 3
structure and function of cells
| Term | Definition |
|---|---|
| organ system | a group of organs that work together to perform a major function. |
| cell | the basic unit of structure and function in living things. |
| multicelluar | composed of many cells. |
| organ | made of different kinds of tissue that work together. |
| cell theory | a widely accepted explanation of the relationship between cells and living things. |
| nucleus | the cell's control center |
| organelles | small structures that carry out specific functions within the cell. |
| cell membrane | controls what substances come into and out of the cell. |
| mitochondria | rod-shaped structures that convert energy in food molecules to energy the cell can use. |
| cell wall | a rigid layer of nonliving material that helps protect and support plant cells. |
| ribosomes | small, grain like bodies that function as factories to produce proteins. |
| vacuole | large, water-filled sacs that are storage area of cells. |
| chloroplast | captures energy from sunlight and uses it to produce food. |
| endoplasmic reticulum | helps form proteins and other materials, and also carries materials throughout the cell. |
| cytoplasm | the material within a cell apart from the nucleus. |
| cytoskeleton | a protein "framework" inside a cell that gives the cell a shape. |
| Golgi body | a structure in a cell that receives proteins and other newly formed materials from the ER, packages them, and distributes them to other parts of the cell. |
| lysosome | a small, round cell structure containing chemicals that break down large food particles into smaller ones. |
| tissue | A group of similar cells that perform the same function. |
| unicellular | made of a single cell. |