1. What are bone marrow and hematopoietic stem cells?
Bone marrow is the soft, sponge-like material found inside bones. It contains immature cells known as hematopoietic (or blood-forming) stem cells. Hematopoietic stem cells divide to form more blood-forming stem cells, or they mature into one of three types of blood cells: White blood cells, which fight infection; red blood cells, which carry oxygen; and [...]