Inferior vena cava

Definition

The inferior vena cava is a large vein that carries deoxygenated blood from the lower body to the heart. It is a crucial component of the circulatory system, facilitating blood flow back to the right atrium.

5 Must Know Facts For Your Next Test

1. The inferior vena cava collects blood from veins in the lower half of the body.
2. It empties into the right atrium of the heart.
3. The inferior vena cava is located alongside the abdominal aorta.
4. It passes through the diaphragm before reaching the heart.
5. Blockage or damage to the inferior vena cava can lead to serious medical conditions such as deep vein thrombosis.

Review Questions

• What function does the inferior vena cava serve in the circulatory system?
• Into which part of the heart does the inferior vena cava empty?
• Why is it important for blood to travel through the inferior vena cava?

Related terms

right atrium: The chamber of the heart where deoxygenated blood from both vena cavae enters.

abdominal aorta: The main artery that supplies oxygenated blood to much of your lower body.

diaphragm: A muscle that separates the chest cavity from the abdominal cavity and aids in respiration.