Long bones primarily function as what in the body?

Long bones primarily function as levers to move the body. Their structure, which features a long shaft (diaphysis) and distinct ends (epiphyses), is specifically designed to facilitate movement. When muscles contract, they exert force on long bones, which in turn create motion at the joints. This lever mechanism allows for efficient movement, whether it be for walking, running, or any other activity that requires locomotion.

While long bones do have additional functions—such as providing support and storing minerals like calcium—these are secondary to their primary role in facilitating movement. The leverage provided by long bones is essential for the effectiveness of muscle contractions and overall physical activity. Thus, their primary function aligns with mechanics and dynamics of movement within the skeletal system.