Across
- 2. a gas that is rich in the blood when it comes from the lungs
- 4. transports oxygen, digested food and water to all parts of the body
- 6. where respiration of air occurs
- 7. a muscular organ that pumps the blood in the body
Down
- 1. a gas that is rich in the blood when it travels from the lower body parts to the heart
- 3. tubes through which blood flow
- 5. it removed from various parts of the body by the blood