A nurse is caring for a patient with a large burn injury. Which skin function is most compromised in this scenario?

A. Cardiac muscle: Cardiac muscle is found only in the heart and contracts involuntarily to pump blood. While it shares some involuntary characteristics with smooth muscle, it is specialized for rhythmic contraction and is not present in the walls of other internal organs.

B. Smooth muscle: Smooth muscle is found in the walls of internal organs such as the stomach, intestines, and blood vessels. It functions involuntarily, controlling movements like peristalsis and vessel constriction without conscious effort, making it essential for organ function.

C. Striated muscle: Striated muscle refers to muscle with a striped appearance, including both skeletal and cardiac muscle. Striated muscle does not describe smooth muscle and is not primarily involved in involuntary movements of internal organs.

D. Skeletal muscle: Skeletal muscle is under voluntary control and is attached to bones to facilitate movement. It is not found in internal organs and does not function automatically, distinguishing it from smooth muscle.

A. The Sternum: The sternum forms the anterior part of the thoracic cage and serves as an attachment point for ribs and the clavicle.

B. The Rib Cage: The rib cage includes both anterior and posterior components, but the posterior attachment is specifically to the vertebral column.

C. The Clavicle: The clavicle connects the upper limb to the axial skeleton at the sternum and does not form part of the posterior thoracic cage.

D. The Vertebral Column: The vertebral column forms the posterior boundary of the thoracic cage, providing attachment points for the ribs and supporting the structure and protection of the thoracic organs.