What is the role of the spleen in the body?

The spleen plays a vital role in the body by acting as a reservoir for red blood cells. It contains specialized blood vessels that can store red blood cells and release them into the bloodstream when needed, such as during times of increased physical demand or blood loss. This function is crucial for maintaining adequate oxygen transport throughout the body, especially during situations where blood volume may be compromised.

In addition to serving as a reservoir, the spleen also contributes to the immune system by filtering out old or damaged red blood cells and helping to fight infections. It contains white blood cells that play a key role in the body's defense against pathogens. Therefore, its role as a reservoir for red blood cells is an essential aspect of its overall function and significance within the circulatory and immune systems.