What bones make up the axial skeleton?

• A. Skull, vertebral column, ribs, and sternum
• B. Humerus, femur, tibia, and fibula
• C. Pelvis, scapula, clavicle, and skull
• D. Radius, ulna, patella, and vertebral column

Answer: (A)

The axial skeleton consists of the bones that form the long axis of the body, which includes the skull, vertebral column, ribs, and sternum. This structure provides support and protection for the brain, spinal cord, and thoracic organs. The skull encases the brain and forms the structure of the face. The vertebral column provides a central support structure for the body and protects the spinal cord. The ribs and sternum form the rib cage, which not only protects the heart and lungs but also plays a crucial role in the mechanics of breathing.

In contrast, the other options list bones that are part of the appendicular skeleton, which includes the limbs and their attachments to the axial skeleton. For example, the options that mention bones like the humerus, femur, pelvis, and scapula refer to the limbs and girdles rather than the foundational structures of the body. Thus, understanding these classifications helps clarify the distinction between the axial and appendicular skeletons in human anatomy.