| A | B |
|---|
| Respiration | Energy releasing process |
| Nose | Warms, moistens, and filters air as it enters respiratory system |
| Epiglottis | Flap of tissue that closes over trachea |
| Trachea | Windpipe; contains larynx |
| Larynx | Voice box; contains vocal cords |
| Vocal Cord | Contains soft muscle tissue that vibrates to produce sound |
| Bronchi (Bronchus) | Passageway(s) into lungs |
| Lung | Major respiratory organ; excretes carbon dioxide and water |
| Alveoli (Alveolus) | Grape-like clusters; site of gas exchange by diffusion |
| Diaphragm | Dome-shaped muscle that aids in breathing; contracts and flattens when inhaling; relaxes when exhaling |
| Excretion | Removal of waste from the body |
| Kidney | Main excretory organ; filters blood; contains nephron |
| Nephron | Filtering factory in the kidneys |
| Capsule | Cup-shaped part of nephron where diffusion occurs |
| Ureter | Carries urine from kidneys to the urinary bladder |
| Urinary Bladder | Muscular sac that stores urine |
| Skin | Outer covering of the body |
| Epidermis | Outer layer of skin |
| Dermis | Inner layer of skin |
| Inhale | To breathe in; diaphragm contracts and flattens; rib muscles contract and pull ribs up and out; causes decrease in air pressure forcing air into lungs |
| Exhale | To breathe out; diaphragm relaxes; rib muscles relax; causes increase in air pressure to push air out of lungs |
| Skin | Excretory organ; excretes perspiration and chemicals |
| Liver | Excretion organ; breaks down proteins, released from cells, into urea |
