What is the primary function of the skeletal system?

The primary function of the skeletal system is to provide the physical foundation of the body. This function encompasses several crucial aspects, including supporting the body's structure, protecting vital organs, and enabling movement by serving as attachment points for muscles. The skeletal system consists of bones, cartilages, and joints, which work together to create a framework that maintains the body's shape and posture.

Additionally, the skeletal system plays a vital role in storing minerals and producing blood cells within the bone marrow. However, its core function remains centered on physical support and structural integrity. Understanding this foundation can help in appreciating how the skeletal system interacts with other systems in the body. The other options provided focus on functions that are associated with different systems, such as the endocrine system for hormone production, the urinary system for waste filtration, and the nervous system for electrical signal transmission, thereby highlighting the unique role of the skeletal system in the body's overall functionality.