Human Anatomy

4. The cavity that contains the heart and lungs.
6. cells responsible for carrying oxygen in the blood.
8. The first segment of the small intestine.
10. The main structural component of the body's circulatory system, responsible for transporting oxygenated blood.
11. The large, flat muscle responsible for breathing.
12. The hormone-producing glands located on top of the kidneys.
14. The structure that allows passage of food from the mouth to the esophagus.
15. The small, bean-shaped organs that filter lymph fluid.
18. The part of the brain responsible for vision.
19. The longest bone in the human body.
20. The paired organs responsible for filtering blood and producing urine.

1. The gland located in the neck that regulates metabolism.
2. The tube that connects the kidneys to the bladder.
3. The body's major blood-pumping organ, divided into four chambers.
5. The portion of the brain responsible for coordination and balance.
7. The smallest bone in the human body, located in the ear.
9. The primary structure of the central nervous system, enclosed within the vertebral column.
13. The outermost layer of the skin.
16. The joint where the femur meets the pelvis.
17. The dense connective tissue that connects muscles to bones.