| A | B |
|---|
| cell membrane | controls what enters and exits the cell |
| cytoplasm | jellylike material that surrounds cell organelles |
| ribosome | site of protein synthesis; found free floating or attached to the ER |
| smooth ER | known as the intracellular highway since molecules use it as a path to move to different parts of the cell |
| rough ER | this cell part is covered with ribosomes; it collects proteins |
| golgi apparatus | this part takes simple molecules and combines them into larger ones; this is the processing, packaging, and secreting organelle |
| mitochondria | respiration center of the cell; known as the "powerhouse"; ATP is formed here |
| lysosomes | sac of enzymes that digests food, old cell organelles, and cells; aka "suicide sacs" |
| microtubules | help keep cell shape; form spindle fibers used in cell division |
| microfilaments | form the cytoskeleton; are responsible for cytoplasmic streaming |
| cilia | short, hairlike projections; occur in large numbers; used for movement in single celled organisms |
| flagella | used for movement; found single or in pairs of two; they are whiplike |
| nucleus | directs the activities of the cell |
| nucleolus | part in the nucleus where ribosomes are made |
| nucleoplasm | liquid found in nucleus |
| cell wall | found in plant cells only; made of cellulose; helps maintain the shape of the cell |
| vacuoles | holds water, food, oil, wastes, and poisons in plant cells; can take up to 90% of a mature plant cell |
| chloroplast | part of the plant cell where photosynthesis takes place |
| chromoplast | synthesize and store pigments that make flowers red, orange, yellow, etc. |
| leucoplast | stores starches, proteins, and lipids in plant cells |
