Across
- 1. The straw-coloured liquid found in blood
- 3. Also called the windpipe, this splits into two bronchioles
- 7. Name of the vein that carries blood to the heart
- 8. Another name for an air sac in the lungs
- 10. What heart chambers are next to the ventricles
- 11. This carries Oxygen in a red blood cell
- 12. Vessels in which gas exchange takes place?
- 16. What type of circulatory system do humans have?
- 18. Sheet of muscle below lungs that aids breathing
- 19. These blood vessels have a pulse
Down
- 1. Name of fatty deposits that contain cholesterol
- 2. Shape of normal red blood cell
- 4. What stops blood in veins flowing backwards?
- 5. Gas that is removed from body via lungs
- 6. Respiration requires oxygen and this
- 9. What vessels carry blood to the heart?
- 13. A vein that carries oxygenated blood?
- 14. The artery that carries fast-flowing oxygenated blood away from the heart
- 15. This increases your pulse and is good for you
- 17. These help blood to clot and scab