Which of the following is NOT a major component of the skeletal system?

The heart is not a major component of the skeletal system because it is part of the cardiovascular system, responsible for pumping blood throughout the body. In contrast, the skeletal system comprises bones and connective tissues that provide structural support, protect vital organs, and facilitate movement.

The skull, spinal column, and pelvis are all vital structures within the skeletal system. The skull encases the brain and forms the shape of the head, the spinal column serves as the central support structure of the body, and the pelvis connects the spine to the lower limbs and supports the weight of the upper body. Each of these components plays a crucial role in maintaining the integrity and function of the skeletal framework, distinguishing them from the heart's role in circulation.