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Block 3; Week 8 > Pictures > Flashcards

Flashcards in Pictures Deck (13):
1

What is shown here? 

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This shows a stricture in the esophagus. Eosinophilic esophagitis. 

2

What is shown here? 

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A biopsy of an esophagus w/ eosinophilic esophagitis. See the red eosinophils. 

3

What day's development is shown here? How can you tell? 

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Day 8!

Blastocyst w/ a trophoblast that now has 2 layers. 

4

What day are we at developmentally here? How can you tell? 

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Days 11-12

b/c uteroplacental circulation has been established

the trophoblastic lacunae have fused w/ maternal sinusoids

5

What day are we at developmentally here? How can you tell? 

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Day 9

trophoblast is at the lacunar stage

6

What time frame are we at developmentally here? How can you tell? 

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end of the 3rd week

can see maternal vessels in intervillous space forming a syncytium. 

7

What day are we at developmentally here? How can you tell? 

day 13

primary villi formation in the trophoblast

8

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? 

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4th month

barrier formed by syncytium & endothelium

9

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? 

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4th week

syncytium

cytotrophoblast

CT

endothelium

10

What stage of pregnancy is this? What's going on at this point? 

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end of the 3rd month

amnion & chorion have fused

uterine cavity is obliterated b/c of the fusion of chorion levae & decidual parietalis

11

What stage of pregnancy is this? What's going on here? 

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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

12

What are we looking at here? Which layer has been removed in the small segment shown? What is that lobule-looking thing shown? 

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**we are looking @ the maternal side of a full-term placenta

Cotyledon: lobule-looking thing

Outer layer: decidua basalis

13

Each placental possibility is shown here for monozygotic twins. Describe which ones are shown. 

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Far left: separate placentas will result

Middle: fused shared placenta will result

Far right: shared placenta & shared amniotic cavity will result