Across
- 2. – Part of the gas exhaled during respiration (CO₂)
- 3. – Connective tissue that transports oxygen, nutrients, and waste
- 6. – Type of circulation between the heart and lungs
- 9. – Blood vessel that carries oxygen-rich blood away from the heart
- 10. – Lower chambers of the heart
- 11. – Upper chambers of the heart
Down
- 1. – Tiny blood vessel where oxygen and nutrients are exchanged
- 4. – Gas essential for cellular respiration
- 5. – Largest artery in the body
- 7. – Organs responsible for gas exchange
- 8. – Organ that pumps blood throughout the body
- 10. – Blood vessel that carries blood back to the heart