Chapter 55 The Placenta Flashcards
Fetal membranes include?
chorion, amnion, yolk sac, and allantonis
The major functioning unit of the placenta is the _________
chorionic villus
lobes of the placenta (approx. 15-20)
cotyledons
Forms the fetal part of the placenta
chorion fondosum
The nonvillious part of the chorion around the gestational sac.
chorion laeve
The fetal structure of the placenta
chorionic plate
The maternal surface of the placenta.
basal plate
functions of the placenta
respiration, nutrition, excretion, protection, storage, hormonal production
Insertion of the umbilical cord at the margin of the placenta within 10mm of the edge.
battleore placenta
umbilical cord that inserts on the membranes.
velamertous placenta
By ______ weeks the yolk sac has diminished to less than 5mm in diameter.
9
Placental implantation within the lower uterine segment.
placenta previa
the amnion develops at the _____menstrual day.
28th
By week ___ gestation the amnion fuses within the chorion and can no longer be seen as two separate membranes.
16
The ________ are the functioning endocrine units of the placenta.
chorionic villi
The umbilical cord develops during the first _____ of gestation.
5 weeks
The cord is surrounded by a mucoid connective tissue called __________.
Warton’s Jelly
The intestines herniate in the proximal umbilical cord at approx. _________
10-12 weeks
The Placenta can be identified as early as ________
8 weeks
The chorionic villi attaches superficially to the myometrium without muscular invasion
Placenta accreta
Further Extension of the chorionic villi into the myometrium.
Placenta increta
Penetration of the chorionic villi through the uterus. Most dangerous.
Placenta precreta
