Developmental Embryology Flashcards
How is O2, nutrients and CO2 and metabolic waste exchanged in a fetus?
via the umbilical cord and placenta
What are the 4 embryonic membranes?
chorion
amnion
yolk sac
allantois
Chorion is…
site of nutrient transfer
Amnion is…
the sac that contains amniotic fluid for shock absorbance
Allantois is…
the outer pocket of the gut that becomes the umbilical cord
Yolk sac is…
the site of early development of blood vessels
What are the primary germ layers of the gastrula?
Ectoderm
Mesoderm
Endoderm
Muscles and bones are what germ layer?
Mesoderm
Nose and mouth epithelium are what germ layer?
Ectoderm
The anal canal is what germ layer?
Ectoderm
Epithelial stomach lining is what germ layer?
Endoderm
The heart is what germ layer?
Mesoderm
The liver is what germ layer?
Endoderm
The lens and retina of the eye is what germ layer?
Ectoderm
The brain is what germ layer?
Ectoderm