Final answer:
White blood cells, also called leukocytes, are made throughout a person's life. While most are made in the bone marrow, the spleen also plays a role in their production.
Step-by-step explanation:
White blood cells, also called leukocytes, are made throughout a person's life.
Most white blood cells are made in the bone marrow, but some also mature in the lymphatic system.
The spleen is an organ that helps filter the blood and plays a role in the production of some types of white blood cells.
While it is not the main site of white blood cell production, the spleen does contribute to the ongoing production of these important immune cells