11 Questions
Which theory proposes that each blood cell lineage is derived from its own unique stem cell?
Polyphyletic theory
What is the predominant cell type during the Mesoblastic/Megaloblastic phase of hematopoiesis?
Primitive Erythroblast (PE)
Which phase of hematopoiesis is characterized by the liver and spleen as the chief sites of blood cell formation?
Hepatic phase
What is the primary site of hematopoiesis during the Medullary/Myeloid phase?
Bone marrow (red)
Which phase of hematopoiesis begins in the 5th month of gestation and continues throughout life?
Medullary/Myeloid phase
What is the typical site for bone marrow aspiration in adults?
Posterior iliac crest
Which theory suggests that all blood cells originate from a single progenitor stem cell?
Monophyletic theory
During which phase of hematopoiesis is the yolk sac the chief site of blood cell formation?
Mesoblastic/Megaloblastic phase
What is the predominant cell type during the 9th week of fetal life in the mesoblastic/megaloblastic phase?
Primitive erythroblast
Which phase of hematopoiesis involves the liver as the chief site, with contributions from the spleen and lymph nodes?
Hepatic phase
For bone marrow aspiration in children, which site is typically used?
Tibia
Explore the polyphyletic and monophyletic theories of blood cell formation, along with the Mesoblastic and Megaloblastic phases of hematopoiesis. Delve into the origin of hematopoietic progenitor cells and their development.
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