| A | B |
|---|
| organelle | tiny cell structures that carry out specific functions within a cell |
| cell wall | rigid layer of nonliving material that surrounds the cells of plants and some other organisms; helps to protect and support the cell |
| cell membrane | outside boundary that separates the cell from its environment and controls what substances come into and out of a cell |
| nucleus | cell's control center, directing all of the cell's activities |
| nuclear envelope | membrane that protects the nucleus |
| chromatin | thin strands in the nucleus containing genetic material that directs a cell's function |
| nucleolus | structure in the nucleus that makes ribosomes |
| ribosomes | organelles that function as factories where proteins are produced |
| mitochondira | "powerhouses" of the cell that convert energy in food molecules to energy the cell can use to carry out its functions |
| endoplasmic reticulum | maze of passageways that carry proteins and other materials from one part of the cell to another |
| Golgi bodies | structures that receive proteins and other newly formed materials from the endoplasmic reticulum, package them, and distribute them to other parts of the cell |
| chloroplasts | green organelles not found in animal cells that capture energy from sunlight and use it to produce food for the cell |
| vacuoles | storage areas of the cell |
| lysosomes | small, round structures containing chemicals that break down certain materials in the cell |
