| A | B |
|---|
| BIOCHEMISTRY | The study of the chemistry of living systems |
| ESSENTIAL ELEMENTS | The 26 elements definitely knoen to be essential to human life |
| TRACE ELEMENTS | metals present only in trace amounts in the human body but essintial for the action of many enzymes |
| CELL | the smallest unit in living things that has the properties normally associated with life |
| PROTEINS | a natural high-molecular-weight polymer formed by condensation reactions between amino acids |
| FIBROUS PROTEINS | provide structural integrity and strength fro many types of tissue and are the main components fo muscle, hair, and cartilage |
| GLOBULAR PROTEINS | roughly spherical shaped, "worker" molecules |
