What is the function of the spleen in the human body?

The function of the spleen in the human body encompasses several important roles, one of which is storing red blood cells. The spleen acts as a reservoir for blood, and it can release red blood cells into the bloodstream when the body requires an increase in oxygen-carrying capacity, such as during physical exertion or in response to certain medical conditions.

While filtering blood is also a function of the spleen, the primary role emphasized in this context is related to storage. The spleen filters out old or damaged blood cells, but its ability to store healthy red blood cells is also significant, contributing to the body’s ability to regulate blood composition and respond to various physiological needs.

This highlights the importance of the spleen not just in blood filtration but primarily in its role as a blood reservoir, particularly regarding red blood cells, crucial for maintaining oxygen levels in the body.