O & G

Question 1

anatomy placenta?

Answer 1

2x unbilical artery (deoxy) away from baby. vein -> oxygenated into baby.

maternal vein & artery feed into intervillous space (pool of maternal blood) come into contact & diffuse in placental membrane.

Question 2

physiology of placenta?

Answer 2

• respiratory function: act like pair of lungs.
• fetal Hb has higher affinity for 02.

-excretion (act like kidney, balance molecule/ molecules out)-> bicarbonate, H+ , lactic, urea, creatinine.

• nutrition function: iron, folate, b12.
• immunity: Ab cross placenta. protection during pregnancy & shortly after birth. igG and IgM.
• endocrine: hormones created to maintain pregnancy-> hCg maintain corteus luteum -> other hormones produced later.
• estrogen (nice, soft and easy to stretch).
• progesterone (5+) to maintain pregnancy. keep uterus relaxed, well perfused.

Question 3

extra notes (ninja nerd) ?

Answer 3

ampulla (secondary -met 2 oocyte and sperm fuse)- > zygote. zona pellucida lining on zygote.

dividing and cleaves -> till 16+ (morula)-> fluid filled blastocele.

implant into uterine lining (endo).

endometrium has stratum basalis/functionalis-> fill w/ glycogen + grow (decidua functionalis invaded and attached to microvilli to pinopods).

trophoblast lack clear cell border-> release hydrolyze enzyme to invade-> B-HCG released-> progesterone.