Question

Which organ receives only oxygenated blood?
A. Gill
B. Spleen
C. Lung
D. Liver

Answer 1

Hint: The organ is also known as the graveyard of the red blood cells. It also plays an important role in the immune system where it acts as a filter for blood.

Complete answer:
Spleen and brains always receive oxygenated blood. Spleen is situated in the upper far left part of the abdomen and primarily acts as a blood filter. It receives oxygenated blood only while lungs and gills receive deoxygenated blood. The liver also receives deoxygenated blood to remove toxic substances. In the spleen, old RBCs are recycled after completion of their life span.

Additional information
- The spleen is an organ found in virtually all vertebrates, it’s structure is similar to a large lymph node.
- The word spleen comes from the ancient Greek word ‘splen’.
- The spleen plays an important role in red blood cells and the immune system.
- It removes red blood cells and holds a reserve of blood, which can be useful in case of hemorrhage.
- The spleen synthesizes antibodies and removes bacteria and antibody-coated blood cells through lymph node circulation.
- In humans, the spleen is purple and is in the left upper corner of the abdomen.
- The spleen is part of the lymphatic system.
- The spleen does not play any role in the process of purification or respiration, thus it receives oxygenated blood.
- A person can live without a spleen but it is an important organ for keeping bodily fluids balanced.

So, the correct answer is ‘Spleen’.

Note: Deoxygenated blood also called venous blood travels from the blood vessels through the venous system into the right atrium of the heart. This blood is then pumped by the right ventricle to the lungs via the pulmonary artery. In the lungs, blood is oxygenated and returns to the left atrium through the pulmonary veins. Venous blood is colder than oxygenated blood and has a lower pH and oxygen content.