Flashcards in Week 3 Development Deck (12)
Formation of 3 embryonic layers
(All 3 form epiblast)
Gastrulation begins with the formation of the...
The primitive streak moves from the ____ end to the ____end
Prechordal plate is formed between the tip of the notochord and the ....
Oropharyngeal membrane. (Future opening of oral cavity)
The notochordal process is formed by..
Prenotochordal cells that invaginate in the primitive pit
The notochordal process grows cranially from the primitive node until reaches the prechordal plate and squires a lumen. This is called the...
The floor of the notochordal process fuses with endoderm and the endoderm degenerates, the amniotic cavity now has open connection with umbilical vesicle through what is known as the....
Cloacal membrane forms on caudal end, analogous to...
Oripharyngeal membrane (cranial side)
Mesodermal cells penetrate core of primary villi making them now the....
End of week 3, mesodermal cells differentiate into blood cells and small blood vessels making them now...
Blood vessels arise from blood islands