Bone marrow, rich in blood-forming and immune system cells, is the soft tissue that fills the spongy interiors of animal bones. Diseases of the marrow can interfere with red blood cell production, and a technique called bone marrow transplantation is used to infuse healthy bone marrow into a patient whose marrow is defective. A large needle inserted into the center of large bones harvests the donor marrow. How are the stem cells from the marrow harvest introduced into the recipient’s body? Discuss