random quiz 1 shit i dunno Flashcards
conceptus phase is what weeks
3-5
embryonic phase is what weeks
6-10
fetal phase is what weeks
10-12
what does the vitelline artery do
circulates blood from the primitive aorta of early developing embryo to the yolk sac
function of allantois
clollect liquid waste and exchange gases used by embryo, develops to urinary bladder
the cloaca is a structure for
the intestinal, urinary and genital tracts
MSD of _____ when yolk sac should be visible
20mm
MSD of -____ when embryo should be visible
25mm
what week is gestational sac seen
~5 weeks
MSD measure when gestational sac is seen
2-3 mm
when is yolk sac normally first seen
5.5 weeks
5 functions/facts of yolk sac
- provision of nutrients to embryo before the placenta
- hematopoiesis
- origin of epithelial lining of the gastro intestinal and resp tract
- Production of albumin and alphaprotein
- becomes incorporated into the gut of embryo
NT can be related to what trisomies
13,18,21
who’s the coolest
sabrina