What is the main function of the skeletal system?

The main function of the skeletal system is to protect and support body organs. The skeletal system provides a framework that supports the body and gives it shape. This structure not only helps maintain posture but also protects vital organs such as the brain, heart, and lungs by encasing them within hard bone structures. For instance, the skull protects the brain, while the rib cage shields the heart and lungs from external damage.

While the skeletal system does play a role in facilitating movement through the attachment of muscles, its primary function centers on support and protection. Additionally, it is important to note that the skeletal system does not transport substances throughout the body—that function is primarily handled by the circulatory system. Similarly, regulating body temperature is not a function of the skeletal system but rather involves the integumentary system and various physiological processes.