| A | B |
| Villi and microvilli | absorb nutrients in the small intestine |
| Amylase | breaks down starch |
| Saliva | contains mucous, buffers, and amylase |
| Pepsin | degrades protein in the stomach |
| Hydrochloric acid | causes protein to lose its shape |
| Nephron | functional unit of the kidney |
| Bowman's capsule | catches filtrate from the glomerulus |
| Dendrites | receives messages from neighboring axons |
| Neurotransmitter | chemical that transmits a signal across a synaptic cleft |
| Myelin | insulating layer around an axon |
| Synapse | where two neurons come together |
| Gray matter | cell bodies of neurons |
| White matter | axons of neurons |
| Loop of Henle | helps balance water in the nephron |
| Urine | contains nitrogen waste, salt and water |
| Filtrate | contains small molecules from the blood |