What is the purpose of the placenta? Which part of the blastocyst eventually becomes the fetal placenta? In birds, developing chicks rely on the yolk sac to provide essential nutrients, but in humans, this is not the case. Why don’t we need it to provide nutrition? What is amniocentesis? How is it done?

Which of the following primary germ layers nervous tissue develops from? a ) yolk sac b) endoderm d) amnin e) ectoderm

The muscular system develops from which embryonic germ layer? a ) Ectoderm B ) Mesoderm D ) Endoderm

Which structure is the outermost extra-embryonic membrane? A ) Placenta ‘ B ) Yolk sac D ) Chorion

How do we develop from a single fertilized egg cell?

Which two extraembryonic structures form the placenta in humans? a) chorion and amnion b) amnion and yolk sac c) allantois and chorion d) yolk sac and allantois Please I need a quicker response

What is the difference between a primary and secondary oocyte

This question is about mammals. a) What is the one defining characteristic that determines a mammal? b) Compare and contrast the three types of mammals with respect to fetal development and birth: the monotremes (such as the platypus), the marsupials (such as kangaroos), and the placentals (such as humans or dogs). That is, where does most of the early development occur, how is the young mammal introduced to the world, and how does the young obtain nourishment once introduced to the world?

What is embryological development?

What happens during embryogenesis?