| A | B |
|---|
| Pharynx | The passageway between the mouth and the esophagus for air and food. |
| Larynx | The voice box. |
| Trachea | The tube that carries air to the bronchi. |
| Bronchus | A tube that connects the trachea to a lung (plural is bronchi). |
| Bronchiole | A tube that branches off the bronchus. |
| Alevolus | A tiny sac at the end of each brochiole that holds air (plural is alveoli). |
| Epidermis | The thin outer layer of skin. |
| Dermis | The thick layer of cells below the epidermis. |
| Fatty layer | Protects organs, keeps in heat. |
| Perspiration | Liguid waste made of heat, water, and salt released through the skin. |
| Excretory system | A series of organs that get rid of cell wastes in the form of urine. |
| Urine | Liquid waste fromed in the kidneys. |
| Ureter | A tube that carries urine from the kidney to the urinary bladder, |
| Urethra | The tube that carries urine out of the body. |
