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How do bones protect internal organs?
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human body
Vintage anatomy charts of the human body showing the skeletal and muscle systems.
Bones protect internal organs primarily through the axial skeleton, which serves as a structural framework for the body. This protection is achieved through specialized bony enclosures tailored to the specific needs of the organs they house:12
- Central Nervous System: The brain is encased and shielded by the cranium, while the spinal cord is protected by the vertebral column. The spinal cord is further secured by bony neural arches and intervening ligaments.12
- Thoracic Organs: The heart and lungs are protected by the rib cage. Because these organs require constant motion, expansion, and contraction, the rib cage is designed as a flexible, semirigid, and expansile structure. This is facilitated by costal cartilages that connect the ribs to the sternum, as well as small joints between the ribs and vertebrae that allow for gliding motion during breathing.132