Across
- 2. The main organ that is in the respiratory system.
- 4. pumps deoxygenated blood in and oxygenated out.
- 6. A system that brings air into and out of the lungs to absorb oxygen and remove carbon dioxide.
Down
- 1. A system that circulates blood from the heart to the rest of the body.
- 3. System to absorb nutrients and remove waste.
- 5. A humans physical structure, including the bones, flesh, and organs.
- 7. The fluid that transport nutrients and other things.