BIOL 1010 Chapter Notes - Chapter 26: Bone Marrow, Cell Potency, Red Blood Cell
14 May 2017
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Waste products of metabolism respiratory gases (o2 and co2) Blood cells are formed within the red marrow inside bones such as the ribs, vertebrae, sternum, and pelvis. Red marrow is a spongy tissue in which unspecialized cells called stem cells differentiate into blood cells. When a stem cell divides, one daughter cell remains a stem cell while the other can take on a specialized function. Myeloid stem cells can differentiate into other white blood cells, platelets and red blood cells. No nucleus in mammals so to be able to pack in more hemoglobin. Contains 250 million molecules of hemoglobin and can transport about a billion oxygen molecules. Single drop of blood contains about 25 million cells (which means there is about 25 trillion red blood cells in your 5l of blood. New blood cells are formed at a rate of 2 million per second. The stem cells continually produce all the blood cells needed throughout life.
