Multiple choice

In mammals, which organ acts as blood bank?

  1. Heart

  2. Lung

  3. Liver

  4. Spleen

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The spleen functions as the body's blood bank by storing platelets and red blood cells, filtering damaged blood cells, and releasing stored blood during emergencies. It also plays important roles in immune function and recycling iron from old red blood cells.