Body Systems

3. – Thick-walled blood vessels that carry oxygen-rich blood away from the heart.
5. – The body system that supports the body, protects vital organs, and allows movement.
6. – A rhythmic throbbing that can be felt in thick-walled arteries.
8. – The system made up of the heart and blood vessels that pumps blood around the body.
11. – The main artery that blood passes through when leaving the heart to travel around the body.
12. – The system that breaks down large food particles into small molecules.
13. – The system used to make more of the same species.

1. – The body system with the brain in overall control.
2. – Thin-walled blood vessels that carry deoxygenated blood towards the heart.
4. – Tiny, thin-walled vessels that allow nutrients and oxygen to pass into body cells.
7. – The body system responsible for removing harmful substances and excess water.
9. – The system that brings oxygen into the body and gets rid of carbon dioxide.
10. – Structures inside veins that prevent the backflow of blood.