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HRM - Anatomy/Embryology/Histology > Placental histology > Flashcards

Placental histology Flashcards

1
Q

Which uterine phase is necessary for placental formation

A

Secretory phase

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2
Q

What two cell types do the trophoblast cells turn into?

A

Syncytiotrophoblast

Cytotrophoblast

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3
Q

Which of the trophoblast cells are not mitotically active?

A

Syncytiotrophoblast

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4
Q

At what point do trophoblasts become cytotrophoblasts and syncitiotrophoblasts?

A

after implanation, around day 7

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5
Q

What small dot structures form inside of the syncytiotrophoblast?

A

Lacunae

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6
Q

When the lacunae fuse, what maternal structure permeates it?

A

Blood vessels

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7
Q

What does a primary villus consist of?

A

Just trophoblast

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8
Q

What does a secondary villus consist of?

A

Mesoderm core
Cytotrophoblast middle
Syncytiotrophoblast outer

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9
Q

What differentiates a tertiary villus from a secondary villus?

A

Blood vessels

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10
Q

What is the “decidual reaction”?

A

Transformation of the endometrial stromal cells

Swell due to glycogen and lipid accumulation

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11
Q

What placental layer is between the conceptus and the myometrium?

A

Decidua basalis

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12
Q

What placental layer is between the conceptus and uterine lumen?

A

Decidua capsularis

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13
Q

What placental layer is continuous with the decidua capsularis?

A

Decidua pariealis

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14
Q

How many lobules divide the placenta? What are they called?

A

15-30 cotyledons

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15
Q

What is the fetal circulation from the umbilical arteries to umbilical vein?

A 
Umbilical artery
Chorionic arteries
Vilar capillaries
Chorionic veins
Umbilical vein
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16
Q

What is the maternal circulation in the placenta?

A

Spiral arteries
Intervillous space
Endometrial veins

17
Q

What placental layer progressively disappears after 20 weeks?

A

Cytotrophoblast

18
Q

What does TORCH stand for?

A 
Toxoplasmosis
Other
Rubella
Cytomegalovirus
Herpes
19
Q

What is “Other” in TORCH?

A 
Hep B
Coxsackievirus
Syphilis
Varicella zoster
HIV
Parvovirus b19
20
Q

What hormone is produced by the placenta to maintain corpus luteum?

A

hCG

21
Q

What takes over the corpus luteum hormone production function after the first trimester?

A

Placenta

22
Q

What is the role of human placental lactogen?

A

Affects growth, lactation, and lipid/carbohydrate metabolism in mammary glands

HRM - Anatomy/Embryology/Histology (16 decks)

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