When does the hepatic phase begin?

Study for the Hematology 1 Test. Utilize flashcards and multiple-choice questions with detailed explanations. Prepare effectively for success!

Multiple Choice

When does the hepatic phase begin?

Explanation:
Hematopoiesis in the embryo progresses through successive sites, with the fetal liver taking over after the earliest yolk sac activity. Around the fourth to fifth week of gestation, hematopoietic stem cells migrate to the developing liver and the hepatic environment becomes capable of supporting the production of blood cells. This marks the start of the hepatic phase, which then becomes the dominant site of blood formation for a considerable portion of gestation before bone marrow takes over later on. So, the hepatic phase begins in the 4th to 5th week of gestation.

Hematopoiesis in the embryo progresses through successive sites, with the fetal liver taking over after the earliest yolk sac activity. Around the fourth to fifth week of gestation, hematopoietic stem cells migrate to the developing liver and the hepatic environment becomes capable of supporting the production of blood cells. This marks the start of the hepatic phase, which then becomes the dominant site of blood formation for a considerable portion of gestation before bone marrow takes over later on. So, the hepatic phase begins in the 4th to 5th week of gestation.

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