| A | B |
|---|
| Digestive System | Breaks down food into units that can be absorbed into the body; eliminates solid wastes |
| Urinary System | Removes nitrogenous wastes; maintains body fluid volume, pH, and electrolyte levels through urine production |
| Respiratory System | Adds oxygen to blood and removes carbon dioxide from blood |
| Nervous System | Controls and coordinates body activities through nerve signals |
| Cardiovascular System | Transports nutirents, hormones, gases and wastes in blood |
| Lymphatic System | Immunity; returns fluid to cardiovascular system |
| Reproductive System | Produces egg cells and sperm cells |
| Integumentary System | Provides a protective barrier for the body; contains sensory receptors |
| Muscular System | Movement both inside and outside the body |
| Endocrine System | Controls cell functions with hormones |
| Skeletal System | Support and protection of major organs |
