Intro to Basic Development Flashcards
Week 1-8
embryonic period
Week 9-36
fetal period
Week 23
embryo is viable
ovum breaks out of perioteal membranes
mittlescherz
what sweeps ovum into tube
scary fallopian fimbriae
oocytes are viable for
24 hours after ovulation
sperms are viable
For 3 days!
reaction of uterine lumen to fertilized egg implanting
decidual reaction
yolk sac is on which side?
ventral
amniotic cavity is on which side?
dorsal
primitive streak starts
caudal and grows toward head
cells streaming from the primitive streak start which layer?
middle layer!
ectoderm
skin, nervous
mesoderm
connective, GU
endoderm
gut
extension of primitive streak rostrally is the origin of
notochord
notochord is
condensation of cells that induces the overlying ectoderm to differentiate into nervous system
lateral ectoderm becomes
skin, jerk.
ectoderm invaginates and pinches off to form
neural tube
neural crest
origin of nervous system,cells that delaminate and migrate fromadjacent to the neural tube