The superior vena cava (SVC) delivers blood from which parts of the body?

• A. Head, legs, and abdomen
• B. Head, chest, and upper limbs
• C. Chest, abdomen, and arms
• D. Legs, abdomen, and head

Answer: (B)

The superior vena cava (SVC) plays a crucial role in the venous system by collecting deoxygenated blood from the upper part of the body and returning it to the heart. The correct answer indicates that the SVC delivers blood from the head, chest, and upper limbs.

Specifically, the SVC receives blood from the following regions:

• The head and neck through the internal and external jugular veins,

• The upper limbs via the subclavian veins,

• The thorax or chest area through the azygos vein system.

This direct connection to these areas allows the SVC to transport a significant volume of blood back to the right atrium of the heart from the upper body before it gets pumped to the lungs for oxygenation.

The other options incorrectly include regions such as the legs or abdomen, which are instead drained by the inferior vena cava (IVC). The IVC collects blood from the lower body, ensuring a clear distinction between the functions of the SVC and IVC in the circulatory system.