Question

Where in the body are new blood cells made?

• A. Heart
• B. Bone marrow
• C. Liver
• D. None of these

Answer 1

Answer:

B. Bone marrow

Red blood cells, most white blood cells, and platelets are produced in the bone marrow, the soft fatty tissue inside bone cavities. Two types of white blood cells, T and B cells (lymphocytes), are also produced in the lymph nodes and spleen, and T cells are produced and mature in the thymus gland.