The document discusses the stages of hematopoiesis from early development in the yolk sac and liver to the later medullary phase where the bone marrow becomes the primary site. It also covers the role of the spleen, lymph nodes, thymus and other organs in blood cell production and maturation. The physiology of red blood cell production, destruction, and regulating factors like erythropoietin are examined in detail.

1. Blood Physiology Carolina C. Jerez, MD Dept. of Physiology

32. Ode to a red cell Erythrocyte, erythrocyte, Thou General Physiologists’ delight! Thy gently rounded biconcavity Arouses wonder, not depravity. Thy subtle shape proclaims an adaptation To Dr. Roughton’s diffusional equation. And Biochemists still persist in hopin’ You’re more than just a bag of hemoglobin. When comes Hemolysis; as come it must to most; You’ll make a very pretty red cell ghost! - Alan C. Burton

33. Thank you! Mwaauh..