Germ cells in the ovary develop from ?
Correct Answer: Yolk sac
Description: C i.e. Yolk SacUmbilical vesicle (Yolk sac) attains full development & is large at 32 days (4-5 weeks)Q. It can be observed sonographically early in 5th week. By 10 weeks, it shrinks to pear shaped 5 mm diameter and after 20 weeks it is not visible.Although umbilical vesicle contains no yolk, its essential due to- Site of origin of primordial germ cells is endodermal lining of wall of umbilical vesicleQ (in 3rd week)- In 3rd week blood first develop in vascularized extraembryonic mesoderm covering the wall of umbilical vesicle, and continues to form there until hemopoietic activity begins in liver during 6th weekIts endoderm, derived from epiblast, gives rise to epithelium of trachea, bronchi, lungs and digestive tract (form primordial gut in 4th week)Transfer nutrients to embryo in 2nd & 3rd weeks
Category:
Anatomy
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now