| A | B |
| gametes | sperm and egg cells |
| small intestine | absorption |
| microvilli | increase surface area |
| acrosome | contain enzymes in the head of a sperm cell |
| cilia | small hair like structure on the surface of some cells |
| human gametes | are haploid |
| cells with 2 sets of chromosomes | are diploid |
| cells with many mitochondria | make lots of energy |
| cells with many ribosomes | make lots of protein |
| epithelial cells | line organs |
| ciliated epithelial cells | line the oviduct |
| sperm cells | are streamlined |
| egg cells | are very large |
| palisade cells | contain many chloroplasts |
| a root hair cell | increases surface area in plants |