Pictures Flashcards
What is shown here?
This shows a stricture in the esophagus. Eosinophilic esophagitis.
What is shown here?
A biopsy of an esophagus w/ eosinophilic esophagitis. See the red eosinophils.
What day’s development is shown here? How can you tell?
Day 8!
Blastocyst w/ a trophoblast that now has 2 layers.
What day are we at developmentally here? How can you tell?
Days 11-12
b/c uteroplacental circulation has been established
the trophoblastic lacunae have fused w/ maternal sinusoids
What day are we at developmentally here? How can you tell?
Day 9
trophoblast is at the lacunar stage
What time frame are we at developmentally here? How can you tell?
end of the 3rd week
can see maternal vessels in intervillous space forming a syncytium.
What day are we at developmentally here? How can you tell?
day 13
primary villi formation in the trophoblast
Is this a picture of the placenta at the 4th week or 4th month? At this point what are the layers of the placental membrane?
4th month
barrier formed by syncytium & endothelium
Does this picture show the placenta at the 4th week of development or the 4th month? At this point what are the layers of the placental membrane?
4th week
syncytium
cytotrophoblast
CT
endothelium
What stage of pregnancy is this? What’s going on at this point?
end of the 3rd month
amnion & chorion have fused
uterine cavity is obliterated b/c of the fusion of chorion levae & decidual parietalis
What stage of pregnancy is this? What’s going on here?
end of 2nd month
still a uterine cavity
amniotic cavity & chorionic cavity haven’t fused yet
chorion laeve & decidual parietalis haven’t fused yet
Note: chorion laeve formed when the villi disappear from that area
What are we looking at here? Which layer has been removed in the small segment shown? What is that lobule-looking thing shown?
**we are looking @ the maternal side of a full-term placenta
Cotyledon: lobule-looking thing
Outer layer: decidua basalis
Each placental possibility is shown here for monozygotic twins. Describe which ones are shown.
Far left: separate placentas will result
Middle: fused shared placenta will result
Far right: shared placenta & shared amniotic cavity will result
