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The function of the spleen is the same in the human body as in other vertebrates. It plays a really big role with red blood cells and the immune system. In terms of red blood cells, it removes worn out cells, recycles iron and also keeps some extra blood handy in case of a hemorrhagic shock. It can synthesize antibodies in the white pulp area (it has white and red pulp) and through blood and lymph node circulation, remove antibody-coated bacteria and antibody-coated blood cells.

The red pulp area apparently keeps half of the body's monocytes which basically aid tissue healing while turn into dendritic cells and macrophages.

The absence of spleens increases risks for certain infections, so it is often likened it to a giant lymph node.

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βˆ™ 14y ago
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Q: What is the function of the spleen in the human body?
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