Placental histology Flashcards Preview

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

Flashcards in Placental histology Deck (22):
1

Which uterine phase is necessary for placental formation

Secretory phase

2

What two cell types do the trophoblast cells turn into?

Syncytiotrophoblast
Cytotrophoblast

3

Which of the trophoblast cells are not mitotically active?

Syncytiotrophoblast

4

At what point do trophoblasts become cytotrophoblasts and syncitiotrophoblasts?

after implanation, around day 7

5

What small dot structures form inside of the syncytiotrophoblast?

Lacunae

6

When the lacunae fuse, what maternal structure permeates it?

Blood vessels

7

What does a primary villus consist of?

Just trophoblast

8

What does a secondary villus consist of?

Mesoderm core
Cytotrophoblast middle
Syncytiotrophoblast outer

9

What differentiates a tertiary villus from a secondary villus?

Blood vessels

10

What is the "decidual reaction"?

Transformation of the endometrial stromal cells
Swell due to glycogen and lipid accumulation

11

What placental layer is between the conceptus and the myometrium?

Decidua basalis

12

What placental layer is between the conceptus and uterine lumen?

Decidua capsularis

13

What placental layer is continuous with the decidua capsularis?

Decidua pariealis

14

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

15-30 cotyledons

15

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

Umbilical artery
Chorionic arteries
Vilar capillaries
Chorionic veins
Umbilical vein

16

What is the maternal circulation in the placenta?

Spiral arteries
Intervillous space
Endometrial veins

17

What placental layer progressively disappears after 20 weeks?

Cytotrophoblast

18

What does TORCH stand for?

Toxoplasmosis
Other
Rubella
Cytomegalovirus
Herpes

19

What is "Other" in TORCH?

Hep B
Coxsackievirus
Syphilis
Varicella zoster
HIV
Parvovirus b19

20

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

hCG

21

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

Placenta

22

What is the role of human placental lactogen?

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