It is an organ of the lymphatic system located in the left side of the abdominal cavity under the diaphragm, the muscular partition between the abdomen and the chest. In humans, it is about the size of a fist and is well supplied with blood. It filters the blood, stores blood cells, and destroys old blood cells.
In the context of human anatomy, which of the following organs is described above?
4. Bone Marrow