Placenta Flashcards by Mohamed Maher

Q

Placenta shape

A

Discoid

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Q

Placental diameter and weight

A

22(15-25)
500 to 600 gm(1/6 of fetus)

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Q

Define cotyledon

A

Villous tree (functional unit)

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Q

Placentalcomponents

A

Chorionic Frondosum)
decidua basalis

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Q

When morula

A

4th day after fertilization

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Q

When completed placenta

A

End of 1st trimester (12,13 w)

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Q

B-hcg source

A

Syncytiotropho blast

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Q

Mechanism involved in the transter
02 - co2

A

Simple diffusion

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Q

Mechanism involved in the transter
Glucose, vitamins

A

Facilitated

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Q

Mechanism involved in the transter
Ions,ptn

A

Active

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Q

1st placental harmone and its function,date

A

HCG) appear after first missed period, keep CL

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Q

HPL function

A

Mammary gland↑

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Q

Placentamembrander

A

Large placenta(covering whole uterus)

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Q

Placenta fenestrata

A

Failed placenta

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Q

Battledore placenta

A

Cord attached at the edge

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Q

Placenta accrete
placentaVelamentosa

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A

Deeply attached placenta distantly attaché

Q

Lacunas stage date

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A

9th day

Q

Placental barrier layers

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A

1ST 5M
syncytium
cytotrophoblast
ct
endothelium
FROM 5TH M
Syncytium
Endothelium

Q

Maternal surface

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A

15-20 cotyledon

Q

When D,capsularis,parietalis fuse

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A

12w

Q

Placenta succentura complication

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A

Retention, pphge-sepsis

Q

Placenta membran comp

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A

Pp

Q

HCG peak
Fall
Coupling

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A

week 10th
14th week
48h

Q

Most sensitive HGG

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A

RIA

No stem villi at term

60

Mc cause of pphge

Ret placenta

Ligamentum tere

Obliteration of the umbilical vein