| A | B |
|---|
| Cytoskeleton | Consists of 3 types of protein filaments |
| Centrosome | Contains centrioles |
| Cilia | Short, hairlike, many on cell, microtubules inside |
| Flagella | Microtubules inside, long, usually single |
| Ribosome | Two subunits, attached to rough ER or free in cytosol |
| Rough ER | Flattened membranous sacs with ribosomes on the outside |
| Smooth ER | Network of membranous tubes, no ribosomes |
| Golgi complex (apparatus) | 3 - 20 flattened membranous sacs called cisterns |
| Peroxisome | Vesicle containing enzymes including catalase |
| Lysosome | Vesicle containing digestive enzymes |
| Proteasome | Contains enzymes called proteases |
| Mitochondrion | Smooth outer membrane, inner membrane in deep folds called cristae |
| Nucleus | Contains chromosomes |
| Nuclear envelope | Double membrane with pores |
| Nucleolus | DNA with instructions for making rRNA |
| Vesicle | Container made of membrane with something inside |
| Centriole | Constructed of microtubules arranged in triplets |
