Which part of the skeleton includes the skull, rib cage, and vertebral column?

• A. Appendicular skeleton
• B. Skeletal system
• C. Muscular system
• D. Axial skeleton

Answer: (D)

The axial skeleton forms the body's central framework, including the skull, rib cage, and vertebral column. It provides central support and protection for the brain, heart, lungs, and spinal cord, keeping the body’s main organs safeguarded and helping with posture and alignment. In contrast, the appendicular skeleton consists of the limbs and their girdles (arms, legs, pelvis, and shoulder girdles), which are mainly involved in movement and interaction with the environment. The skeletal system refers to the entire framework of bones and cartilage, not a specific region, while the muscular system involves muscles and tendons rather than the bones themselves.