16 Questions
What is the significance of gastrulation in embryonic development?
Formation of the trilaminar germ disc
Which term is used to describe the embryo during the formation of three germ layers?
Gastrula
What is the role of the primitive streak in gastrulation?
Formation of the mesoderm
Which structure is formed by cell proliferation at the cranial end during gastrulation?
Primitive node
What determines the primordial axis of the embryo and gives the embryo perpendicularity?
Notochord
What process results from the induction of the neuroectoderm cells by the notochord?
Neurulation
Which structure forms the basic signals for the development of the axial skeleton in the embryo?
Notochordal plate
What can be a consequence of the persistence of primitive streak remnants according to the text?
Creation of a sacrococcygeal teratoma
What is the significance of the first 2 pharyngeal arches observed on the 24th day?
Formation of the lower jaw
How does the embryo's shape change due to head and tail folds?
Assumes a C shape
What is the role of the amniotic cavity during embryonic growth?
Surrounds the embryo completely
Why does the yolk sac narrow and become a small sac connected to the midgut?
To facilitate nutrient transfer to the developing embryo
What happens to the fingers towards the end of the 7th week of development?
They are separated
What is the status of the caudal process (tail) by the end of the 8th week of development?
It disappears completely
What happens to the eyes at the end of the 8th week of development?
They are well developed with closed eyelids
What occurs to the scalp vascular plexus around the head during the 7th week of development?
It forms a visible band
Test your knowledge on the stages of embryonic development, including the formation of the dermis, axial skeleton, neural tube, and amniotic cavity. Identify key features like the neurpore, embryo folds, yolk sac, and vitelline duct.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
