Across
- 3. The structure that connects muscles to bones
- 6. The longest bone in the human body
- 7. The valve between the left atrium and left ventricle
- 10. The process of blood cell formation
- 14. The small intestine segment where most nutrient absorption occurs
- 17. The type of joint found in the shoulder and hip
- 18. The outermost layer of the skin
- 19. The fluid that cushions and protects the brain and spinal cord
- 20. The gland that regulates metabolism
Down
- 1. The large vein that carries deoxygenated blood to the heart
- 2. The part of the brain that controls involuntary functions
- 4. The functional unit of the kidney
- 5. The primary muscle used for respiration
- 8. The part of the eye that controls the amount of light entering
- 9. The smallest functional unit of life
- 11. The bone that forms the forehead
- 12. The part of the brain responsible for balance
- 13. The protein responsible for oxygen transport in red blood cells
- 15. The artery that supplies blood to the heart muscle
- 16. The largest organ in the human body