Which areas are considered weight bearing sites in the skeleton?

• A. Skull and rib cage
• B. Upper extremities
• C. Lower extremities and spine
• D. Feet and hands

Answer: (C)

Weight-bearing sites in the skeleton are areas that support body weight and experience stress during physical activities, helping to maintain bone density. The lower extremities, which include the legs and pelvis, are crucial in bearing weight during activities such as standing, walking, and running. The spine, particularly the lumbar region, also plays a significant role in supporting the upper body and absorbing loads during movement.

In contrast, areas like the skull and rib cage primarily provide protection for the brain and vital organs rather than bearing weight. The upper extremities can bear some weight, particularly in specific activities; however, they are generally less involved in weight-bearing compared to the lower extremities and spine. The feet and hands do experience forces during various actions but do not represent the major support structures for body weight. Thus, the correct choice encompasses both primary weight-bearing regions—lower extremities and spine—essential for maintaining bone health and overall stability in the body.