Across
- 3. Mineral needed for haemoglobin to function properly
- 5. Liquid part of the blood
- 8. Tiny air sacs that are the site of gas exchange in the lungs
- 10. Pumps blood around the body
- 12. Colour of blood cells that carry oxygen
- 13. Carries air from the mouth to the bronchi
- 14. Chemical that binds oxygen in the blood
- 15. Sugar that is carried in the plasma
- 17. Tiny, thin-walled blood vessel that collects carbon dioxide from body cells.
- 18. Causes increase in heart rate
- 21. Pressure wave that travels along the walls of the arteries each time the heart beats
- 22. Bones that protect our heart and lungs
Down
- 1. Prevents backflow of blood in the circulatory system
- 2. Flat sheet of muscle that has a role in the breathing mechanism
- 4. Colour of blood cells that fight infection
- 6. Chamber of the heart that blood flows into
- 7. Platelets carry substances that help this occur
- 9. Blood vessel that carries blood to the heart
- 11. One of the functions of the blood
- 16. Gas that diffuses from the blood in capillaries to the body cells
- 19. Blood vessel that carries blood away from the heart
- 20. Organs for breathing