Vaginal lab Flashcards
what is the broad ligament?
a sheet of peritoneum which the ovary attaches on top of via short mesentery
what is the blood supply to the ovaries?
ovarian artery, venous drainage from right and left ovarian arteries going to the IVC and left renal vein respectively
how is the ovary attached to the uterus?
via the ovarian ligament.
the suspensory ligament attaches the ovary to the lateral wall of pelvis
describe the fallopian tubes
four parts
infundibulum- opening to the peritoneal cavity, finger shaped projections
ampulla- most likely place for fertilisation
isthmus- narrowest section
interstitial- opening into the uterus
describe the uterus
cervis, fundus and isthmus. blood supply comes from the uterine arteries branching from the internal iliac
uterine vein drains the uterus to internal iliac vein
describe the different stages of oocytes
the primordial follicle is a small oocyte surrounded by one layer of somatic follicular cells
the primary follicle has many layers of follicular cells and the development of the zona pellucida
the secondary follicle- contains an antrum full of fluid. follicle cells differentiate into granulosa cells and theca cells
describe the relationship between theca cells and granulosa cells
theca interna produce androgens from cholesterol.
the androgens are passed to granulosa which contain aromatase converting it into oestrogen
how do follicles exit into the fallopian tubes
one secondary follicle contains more hormone receptors so grows into a tertiary stage
it grows and eventually ruptures releasing the oocytes. the rest of the secondary follicles degenerate via atresia
describe the histological zones of the uterus
myometrium- smooth muscle section of the uterus containing vascular and stromal cells
endometrium- where embryo would implant. columnar epithelium.
describe the endometrium in further detail
there is a stratum compactum, functionalis, basalis and spongiosum
the corpus luteum degenerates and stops secreting progesterone.
this causes the functionalis to shrink and spiral arteries compact. the functionalis dies as it becomes deprived of oxygen and blood
describe the histology of the vagina and uterine tube
the vagina has a stratified squamous non-keratinised epithelium
glycogen is secreted by the vagina making it an acidic environment killing microorganisms
mucus comes from parthenin glands
ciliated specialisations beat the egg towards the uterus
