| A | B |
|---|
| Mitochondria | Site of ATP synthesis |
| Ribosomes | Site of protein synthesis |
| Rough Endoplasmic Reticulum | Proteins are bound in vesicles for transport to the Golgi Apparatus |
| Smooth Endoplasmic Reticulum | Site of lipid and steroid synthesis, lipid metabolism, and drug detoxification |
| Golgi Apparatus | Modifies, packs and processes proteins for secretion from the cell, inclusion of lysosomes |
| Lysosomes | Sites of intercellular digestion |
| Peroxisomes | Detoxifies a number of toxic substances, most important enzyme, catalase, breaks down hydrogen peroxide |
| Microtubules | Supports the cell and gives shape, forms centrioles |
| Microfilaments | Involved in muscle contraction, help forms the cell's cytoskeleton |
| Intermediate Filaments | The stable cytoskeleton elements, resists mechanical forces acting on the cell |
| Centrioles | Forms the spindle and asters during mitosis, forms the bases of cilia and flagella |
| Cilia | Moves in unison to propel substances across the cell surfaces |
| Flagella | Propels the cell |
| Plasma Membrane | External cell barrier, acts in transport of substances in or out of the cell and maintains a resting potential |
| Nucleus | Control center of the cell, responsible for transmitting genetic information |
| Nuclear Envelope | Separates the nucleoplasm from the cytoplasm, regulates passage of substances to and from the nucleus |
| Nucleoli | site of ribosome subunit maunfacture |
| Chromatin | DNA constitutes the genes |
| Cytoplasm | Jelly-like cellular region which holds organelles together, provides the course for the mechanics of the cell |
