placenta Flashcards
placenta means
it means flat cake
placenta originate from
maternal origin …decidua basalis
fetal origin ….chorion frondosum
position
it in the upper part of uterus ( funds)
Ant 1/3
Post 2/3
feature of the placenta
spongy disc
20cm long
2.5cm thick
500g
consist from the fetal part is smooth cover by membrane
and the maternal part is rough (cotyledons)cover isn’t cover by any membrane
function of placenta :
1- as lung 2- as kidney 3- source of nutrient 4-immunity 5-hormones
which Microorganism pass through placenta ?
spirochetes , syphilis and rubella
placenta praaevia
means the placenta in the lower part rather than in the funds 99.5%
if the chorionic villi attach to myometrium lead to …
Acreta 75-78%
Increta17%
precreta5%
bilobed placenta
tow equal lobes
succenturiata placenta
acessary placenta
placenta have gapes
placenta fensetrata
when the placenta get abnormal weight ?
1- congenital syphilis
2-hydrops fettles
3-DM
infract placenta types
white…due to excessive fibrin
red …due to heamorage but the old one may become white due to fibrin
content of the umbilical cord
2arteries and 1 veins
cover by amnion and with whartons jelly and alintos attach to the bladder
source of Wharton jelly …
extraembryoinc mesoderm
umbilical cord …
50cm long
1cm thick
whats the difference between the true and false knot?
false … dilation of the veins
true …. fetus pass through the loop of the cord
what happen if the umbilical cord inserted into the edge of the placenta ?
so the Bv will pass through the membrane of the placenta when the membrane rupture it lead to bleeding (velamentous insertion)
