Human Anatomy

4. The primary structure of the central nervous system, enclosed within the vertebral column.
6. The outermost layer of the skin.
7. The portion of the brain responsible for coordination and balance.
9. The body's major blood-pumping organ, divided into four chambers.
10. The joint where the femur meets the pelvis.
12. The first segment of the small intestine.
13. The cells responsible for carrying oxygen in the blood.
15. The smallest bone in the human body, located in the ear.
17. The cavity that contains the heart and lungs.
20. The large, flat muscle responsible for breathing.

1. The dense connective tissue that connects muscles to bones.
2. The part of the brain responsible for vision.
3. The hormone-producing glands located on top of the kidneys.
5. The paired organs responsible for filtering blood and producing urine.
8. The small, bean-shaped organs that filter lymph fluid.
11. The main structural component of the body's circulatory system, responsible for transporting oxygenated blood.
14. The tube that connects the kidneys to the bladder.
16. The gland located in the neck that regulates metabolism.
18. The structure that allows passage of food from the mouth to the esophagus.
19. The longest bone in the human body.