Which structure protects the thoracic cavity and supports the upper body?

Which structure protects the thoracic cavity and supports the upper body?

• A. Sternum
• B. Rib Cage
• C. Pelvis
• D. Femur

Answer: (B)

The rib cage protects the thoracic cavity and supports the upper body. It forms a sturdy yet flexible frame around the chest, made up of the sternum in front, the thoracic vertebrae in back, and the 12 pairs of ribs. This cage shields vital organs like the heart and lungs from injury and provides attachment points for muscles involved in breathing, posture, and shoulder movement, helping to keep the upper body stable. In contrast, the pelvis and femur are part of the lower body structure and protect organs in the pelvic region while bearing body weight, not the chest. The sternum is a key component, but the protective and supportive function comes from the entire rib cage as a unit.

The rib cage protects the thoracic cavity and supports the upper body. It forms a sturdy yet flexible frame around the chest, made up of the sternum in front, the thoracic vertebrae in back, and the 12 pairs of ribs. This cage shields vital organs like the heart and lungs from injury and provides attachment points for muscles involved in breathing, posture, and shoulder movement, helping to keep the upper body stable. In contrast, the pelvis and femur are part of the lower body structure and protect organs in the pelvic region while bearing body weight, not the chest. The sternum is a key component, but the protective and supportive function comes from the entire rib cage as a unit.