Physiology of Pregnancy Flashcards
What sweep ovum into the oviduct?
fimbriae
what does a fertillised ovum become?
morula –> blastocyst
what does the inner cells of a blastocyst become?
fetus
what cells create the placenta?
trophoblastic cells
decidual tissue
How does the placenta form?
trophoblastic cells invade the endometrium
when is the placenta and fetal heart functional by?
5th week of pregnancy
What signals the corpeus leuteum to continue to produce progesterone?
hCG
What does the placenta act as?
physiological arterovenous shunt
What is a arterovenous shunt?
circulation within intervillious space acts as a shunt
What do trophoblastic cells become?
syncytiotrophoblasts
What cells invade maternal arteries?
Cytotrophoblast cells
What is the function of Cytotrophoblast cells?
increases the diameter of maternal blood vessels and reduces the resistance
What carries oxygen rich blood to the fetus?
Umbilical vein
what carries oxygen poor blood back to mother?
x2 umbilical arteries
