embryology test 1 part 1

trophoblast differentiates into ____ and ____ around ____

syncytio- and cyto- around day 7 - already present in week one but divides at beginning of second week

inner cell mass differentiates into ____ and ____ around

epiblasts and hypoblasts at beginning of week 2

blastocystic cavity becomes ____ in second week

yolk sac cavity

the epiblast gives rise to the

ectoderm, mesoderm, and endoderm, amnion and its cavity, extraembryonic ectoderm and mesoderm

epiblasts are made of this type of epithelium

simple columnar

hypoblasts are made of this type of epithelium

simple cuboidal

hypoblasts contribute to this structure

extraembryonic endoderm aka primary yolk sac

hypoblasts have this nickname,

primitive endoderm

mesoderm forms in the ____ week

third

epiblasts are nicknamed

primitive ectoderm

amniotic cavity is full of

water

primitive endoderm is made of what epithelium

simple cuboidal

primitive endoderm and extraembryonic endeoderm come from

hypoblasts

exocoelemic membrane is also called

heuser’s membrane, primary yolk sac vesicle, primary umbilical vesicle

epiblast cells are primitive

ectoderm

hypoblast cells are primitive

endoderm