Spleens are basically blood cleaners. They don't do the same thing as a kidney by removing nitrogenous wastes. Instead they have white blood cells that destroy old red blood cells. They also add new blood cells to the blood (in some animals). They basically take away the "trash" of old RBCs.
The rat spleen filters blood, removes old or damaged red blood cells, and plays a role in the immune response by producing antibodies and storing immune cells.
The function of a shark's spleen is to produce, degrade, and store red blood cells.
spleen
Spleen
Spleen
Almost all vertebrates have a spleen. This means they have a "backbone". The function of the spleen is to filter the blood and to act as a reserve in case of heavy bleeding.
the spleen
The spleen has the hemolytic function of destroying worn-out red blood cells and releasing their hemoglobin for reuse.
The spleen's function is to store blood, disintegrate the old blood cells, filter any foreign substances from the blood, and produce lymphocytes.
Openings for the rat to breath in and out.
Spleen
spleen