Human Body Systems

4. This system acts as structural support for the body.
8. Hair-like structures in the respiratory system that are responsible for clearing mucus/debris from the airways.
10. The red blood cell chemical that oxygen binds to in gas exchange.
11. The system responsible for breaking down food and absorbing nutrients.
13. The muscle responsible for breathing, located beneath the lungs.
14. This system includes the brain and spinal cord.

1. This system controls voluntary and involuntary movements.
2. The organ responsible for pumping blood throughout the body.
3. This system includes the lungs and helps with breathing.
5. This system regulates hormones
6. This organ filters waste from the blood and helps maintain fluid balance in the body.
7. Organ responsible for supporting fetal development until birth.
9. The tiny air sacs in the lungs where gas exchange occurs.
12. This system helps fight infections and diseases.
15. Largest human organ.