Make No Bones About It, Marrow Is Important

Out of One, Comes Many

Marrow is a yellow-white tissue in the center of many bones. It's the location of a type of stem cell (specifically, the pluripotential hemopoietic stem cell), from which come the many types of blood cells. It's a marvelous biological feat that all the cells in our blood -- red, white and the platelets -- come from one type of cell that develops into such a variety of results.