Superior vena cava

Definition

The superior vena cava is a large vein that carries deoxygenated blood from the upper half of the body to the heart. It empties into the right atrium of the heart, playing a crucial role in systemic circulation.

5 Must Know Facts For Your Next Test

1. The superior vena cava collects blood from the head, neck, upper limbs, and chest.
2. It is formed by the merging of the left and right brachiocephalic veins.
3. The superior vena cava is approximately 7-8 cm long.
4. Its primary function is to ensure efficient return of blood to the heart for oxygenation.
5. Obstruction or compression of this vein can lead to a medical condition known as superior vena cava syndrome.

Review Questions

• What regions of the body does the superior vena cava collect blood from?
• Into which chamber of the heart does the superior vena cava empty?
• What could be a potential consequence if there is an obstruction in the superior vena cava?

Related terms

inferiorVenaCava: A large vein that carries deoxygenated blood from the lower half of the body to the heart.

rightAtrium: The right upper chamber of the heart where deoxygenated blood is received from both inferior and superior vena cava.

brachiocephalicVeins: Veins formed by the union of each corresponding internal jugular vein and subclavian vein; they merge to form the superior vena cava.