What is the main function of the spleen?

Red pulp: Mechanical filtration of red blood cells. In mice: Reserve of monocytes - white pulp: Active immune response through humoral and cell-mediated pathways. - Production of opsonins, properdin, and tuftsin.

- Creation of red blood cells. While the bone marrow is the primary site of hematopoiesis in the adult, the spleen has important hematopoietic functions up until the fifth month of gestation. After birth, erythropoietic functions cease, except in some hematologic disorders.As a major lymphoid organ and a central player in the reticuloendothelial system, the spleen retains the ability to produce lymphocytes and, as such, remains an hematopoietic organ.

- Storage of red blood cells and other formed elements. In horses roughly 30% of the red blood cells are stored there. The red blood cells can be released when needed.

In humans, up to a cup (236.5ml) of red blood cells can be held in the spleen and released in cases of hypovolemia.14 It can also store platelets in case of an emergency. en.wikipedia.org/wiki/Spleen.

The function is related to the immune system or the blood supply. It removes erythrocytes, old red blood cells, from the blood and produces lymphocytes, white blood cells. Lymphocytes produce antibodies and assist in removing microbes and other debris from the blood supply.

Spleen is a lymph gland which contains a large number of lymphocytes and other cell types which "filter" the blood from things that aren't supposed to be there. It has small chambers and passageways which also filter the blood removing damaged and dying cells. Because of these passageways it contains a great amount of blood which can be "put back into circulation" if the blood pressure drops and it is needed back in the body.

The majority of the spleen's functions are related to the immune system or the blood supply. The spleen removes old red blood cells, called erythrocytes, from the blood supply and removes, stores and produces white blood cell lymphocytes. These stored lymphocytes produce antibodies and assist in removing microbes and other debris from the blood supply.

Probably the single most important function of the liver is the secretion of bile to aid in digestion of the food. Without the bile, we would not be able to digest. You can find more information here: plim.org/liver.html.

The main function of the heart is to pump blood containing oxygen and nutrients to the body. It beats 60-80 times a minute!

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