Across
- 3. What we breath out. Carbon ______
- 5. Number of chambers in the heart
- 7. Main artery in the body
- 9. Main organ of the respiratory system
- 10. Stores bile before it is released into the intestine. (4,7)
- 12. Where most digestion occurs. ______ intestine
- 13. Connects the mouth to the stomach
- 14. The _______ system is responsible for absorbing and eliminating vital gases
- 17. Long tube protected by cartilage. Also known as your airway
- 18. Absorbed into the blood stream during respiration
- 19. Ensures blood cannot flow backwards
- 20. Site for water absorption. Large _________
- 21. Organ with no known use in the human body
- 23. Small round sacs with large surface area. Important for respiration
- 25. Main organ of the circulatory system
- 26. Any blood vessel heading towards the heart is known as a _____
Down
- 1. Blood enters the heart here. Right _____
- 2. Blood exits the heart through the left ______ before being pumped to the body
- 4. The body system responsible for pumping blood around the body
- 6. The smallest type of blood vessels
- 8. Main muscle involved in breathing
- 11. The body system that absorbs nutrients from food
- 15. Main artery to the lungs. ________ artery
- 16. Thick muscular wall that divides the left and right sides of the heart
- 22. Where the nasal and oral passages meet. Also known as the throat
- 24. Also known as the voice box or Adams Apple