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Questions and Answers
Where does definitive haemopoiesis derive from?
Where does definitive haemopoiesis derive from?
- Yolk sac
- Dorsal aorta (correct)
- Semi-solid medium
- Bone marrow
During normal childhood and adult life, what is the only source of new blood cells?
During normal childhood and adult life, what is the only source of new blood cells?
- Bone marrow (correct)
- Semi-solid medium
- Yolk sac
- Dorsal aorta
Where is the main site of haemopoiesis in the first few weeks of gestation?
Where is the main site of haemopoiesis in the first few weeks of gestation?
- Bone marrow
- Yolk sac (correct)
- Dorsal aorta
- Semi-solid medium
What is the most important site of haemopoiesis from 6 to 7 months of fetal life?
What is the most important site of haemopoiesis from 6 to 7 months of fetal life?
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How can various progenitor cells be identified?
How can various progenitor cells be identified?
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Study Notes
Haemopoiesis
- Definitive haemopoiesis derives from the mesoderm.
- In normal childhood and adult life, the bone marrow is the only source of new blood cells.
- The main site of haemopoiesis in the first few weeks of gestation is the yolk sac.
- The liver is the most important site of haemopoiesis from 6 to 7 months of fetal life.
- Various progenitor cells can be identified by their ability to give rise to colonies of different types of blood cells in vitro.
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