embryology Flashcards
when does cleavage occur
~24h
when is the morula formed
day 4
when is the blastocytst formed
day 5
when does implantation occur
6 days
what becomes the embryo
inner cell mass
what forms the chorion/placenta
trophoblast
when does the amniotic cavity form
9 day
what does the extraembryonic mesoderm form
placenta and chorion
when does the extraembryonic mesoderm form
9 days
when does gastrulation occur
16 days
what gives rise to the notochordal process
migrating ectoderm to form mesoderm
fomration of neural tube is called waht
neurulation
neurulation steps and times
17 - neural plate
19 - groove
20 - folds
22 - tube
sclerotome forms what
backbone and ribs
myotome forms what
back and neck myscle
dermatome dorms what
CT
when does embryonic folding occur
22-26 days
what forms the head end
cranial fold
what forms the tail end
cordal fold
orapharyngeal membrane forms what
mouth
what forms the anus
cloacal membrane
when do pharyngeal membranes form
28 days
what do neural crest cells form
facial structures
nerve cells
melanocytes
what are the 3 somites regions?
sclerotome, dermatome, myotome
