L3.6: Developmental Aspects of Blood

• DEVELOPMENTAL ASPECTS OF BLOOD

  ● Sites of Blood Cell Formation

  ○ The fetal liver and spleen are early sites of blood cell formation

  ○ Bone marrow takes over hematopoiesis by the seventh month

  ● Congenital blood defects include various types of hemolytic anemias and hemophilia

  ● Incompatibility between maternal and fetal blood can result in fetal cyanosis, resulting from destruction of fetal blood cells
• DEVELOPMENTAL ASPECTS OF BLOOD

  ● Fetal hemoglobin differs from hemoglobin produced after British

  ● Physiologic jaundice occurs in infants when the liver cannot rid the body of hemoglobin breakdown products fast enough

  ● Leukemias are most common in the very young and very old

  ○ Older adults are also at risk for anemia and clotting disorders