| A | B |
| Centrosome | Area of cytoplasm THAT COORDINATES THE BUILDING AND BREAKING OF MICROTUBLES |
| Cytoplasm | Gel-like internal substance of a cell, including the watery intracellular fluid and the many organelles suspended in it |
| Endoplasmic reticulum | Network of membranous tubules and vesicles located deep inside the cytoplasm |
| Golgi Apparatus | Membranous organelle that processes and packages protein molecules |
| Mitochondria | Organelles containing enzymes essential for making ATP |
| Nucleus | Large,membranous structure within a cell, contains DNA |
| Plasma membrane | membrane that separates the contents of a cell from the surrounding tissue fluid |
| Ribosome | nonmembranous structure whose function is protein synthesis |