Human body systems

1. These are the muscles which allow your heart to pump.
3. This system supports your body, protects your organs, and helps with movement.
5. The _______ intestine is where the nutrients are taken out of the food.
7. This system helps break down food, absorb nutrients, and remove waste.
10. These are the smallest blood vessels.
13. This carries air from your nose/mouth down into your lungs.
14. This system allows you to move.
15. These are blood vessels which carry oxygen rich blood away from your heart.
17. This organ is the control center of your body.
18. These are blood vessels which carry blood back to your heart.
19. This system sends messages to/from your brain from/to the other parts of your body.
21. The _______ intestine is where the excess liquid is taken out of the food and is where waste is stored.

2. This system takes in oxygen and exhales carbon dioxide.
4. This carries the food from your mouth to your stomach.
6. This muscle expands and contracts to allow your lungs to fill with air and expel air.
8. This system moves blood through the body.
9. This is the main organ in your circulatory system.
11. This organ contains digestive fluids and is where your food is digested.
12. These carry messages to and from your spinal cord.
16. These muscles are attached to your bones and allow you to move.
20. This is the largest organ of your body.