Indicator of sta of gastrulation is the formation of ?
Correct Answer: Primitive streak
Description: Ans. is 'c' i.e., Primitive streak Gastrulation, the most characteristic even occurring during Yd week of gestation, establishes all 3 germ layers (ectoderm, mesoderm & endoderm). It conves the bilaminar embryonic disc into a trilaminar, and is the beginning of morphogenesis. Ectoderm is first and mesoderm is last to develop.1" sign of gastrulation is appearance of primitive streak on the surface of epiblast. The primitive streak appears caudally in the median plane on dorsal aspect of the embryonic disc. So now it's possible to identify the embryo's craniocaudal axis, its cranial and caudal end, its dorsal and ventral surfaces, and its right and left sides.
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