Q. Find out the correct statement.
A) Amnion is the outer layer containing amniotic fluid that acts as shock absorber to the soft embryo
B) Yolk sac is foetal membrane that helps in the nourishment of the embryo in general
C) In mammals, allantois is not excretory in function
D) Chorio-allantoic membrane davelops villi and contribute much to the development of placenta
Explanation
Amnion is formed of mesoderm on outside and ectoderm inside. It has no blood vessels. Space between amnion and foetus is amniotic cavity and it contains amniotic fluid Amnion protects foetus from mechanical shock.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.