The human skeleton is a complex framework of bones that provides structure, support, and protection for the body. It consists of 206 bones in adults, divided into two main parts: the axial skeleton (which includes the skull, spine, ribs, and sternum) and the appendicular skeleton (which includes the limbs and their attachment points, such as the pelvis and shoulder girdles). The skeleton also facilitates movement by providing attachment points for muscles, produces blood cells in the bone marrow (hematopoiesis), and stores minerals like calcium and phosphorus. It is essential for protecting vital organs, such as the brain, heart, and lungs, and enables mobility through its joints.