Human Body Review Worksheet
| # | Answer |
|---|---|
| 1 | The skeletal system and the muscular system. |
| 2 | The brain, because it controls many body actions and helps send messages through the body. |
| 3 | Input = senses such as eyes or ears; Output = muscles or speech; Processing = brain. |
| 4 | The app could use a heart-rate sensor to measure how fast the heart is beating. This helps the app track exercise activity and effort. |
| 5 | Messages in the body travel through nerves from the brain to other body parts, like signals moving through wires or networks in a computer. Both systems send information from one place to another so different parts can work together. |