Histology Flashcards
functions of the ovary
gamete production
production of steroids - oestrogens and progestins
what is found in ovarian medulla
loose connective tissue, arteries, veins, lymphatics
what is found in ovarian cortex
ovarian follicles
what tissue encapsulates ovary
tunica albuginea
describe the formation of a primordial follicle from embryonic development
germ cells from yolk sac invade ovaries and proliferate to oogonia
meiosis begins and is arrested at prophase I to form primordial follicle
describe the features of a primary follicle
outer layers of granulosa cells become more cuboidal instead of squamous and there is early formation of zona pellucida
describe the features of a late primary follicle
granulosa cell proliferation and establishment of zona pellucida
describe the formation of a secondary follicle
fluid filled antrum with features of granulosa cell proliferation and zona pellucida
describe the appearance of the graffian follicle
large antrum, cells lining oocyte and external follicle
inner layer of stromal cells of follicle and function
theca interna
secrete oestrogen precursors made to oestrogen by granulosa cella
outer layer of stromal cells of follicle
theca externa
describe the process of graffian follicle becoming fully mature ready for ovulation
oocyte completes meiosis I and produces secondary oocyte and polar body that is discarded
undergoes meiosis II up to metaphase II
when does the oocyte fully complete meiosis II
when fertilised by sperm
describe what happens to graffian follicle after oocyte is released during ovulation
follicle involutes to corpus haemorrhagica then corpus luteum
theca and granulosa cells secrete oestrogen and progesterone
if no implantation then degenerates to corpus albicans
if implantation HCG prevents degeneration temporarily to maintain progesterone levels
how many smooth muscle layers in uterine tubes
2 in ampulla, 3 in isthmus
describe how oocyte moves into uterine tube
infundibulum moves to direct oocyte into uterine tube
fimbriae brush oocyte
once in tube there is gently peristalsis to move oocyte along
what is the perimetrium made up of
outer loose connective tissue covered by mesothelium
what is the myometrium made up of
smooth muscle, collagen, elastic fibres