whats unique about oogenesis
primary oocytes begin meiosis 1 but stop
how does oogenesis start
germinal epithelium which are diploid divide by mitosis to make diploid oogonia
what surrounds the primary oocytes
primary follicles
how are primary follicles made
germinal epithelium cell divide to form diploid follicle cells
what does puberty actually do
stimulate the primary follicles
what happens just before ovulation
primary oocyte completes meisosis 1 which creates a secondary oocyte with most of cytoplasm
what does secondary oocyte also create when created
first polar body
what does the primary follicle develope into
secondary follice - graafian follicle
whats the point of the graafian follicle
migrates to surface to ovary where it bursts and releases secondary oocyte (ovulation)
what process is graafian follicle a part of
ovulation
what happens to the secondary oocyte after being released
begins meisos 2 but stops at metaphase unless fertilisation takes place
after fertilisation what happens to secondary oocyte
meiosis 2 compelted creating an ovum with majority of cytoplasm and a second polar body
why do polar bodies have loads of cytoplasm
nutrients until placenta is formed
what happens to graafian follice after ovulation
becomes corpus luteum
if fertilisation occurs what happens to the corpus luteum
produces hormones
if no fertilisation occurs what happens to the corpus luteum
regresses into corpus albicans
what covers the cell membrane of a secondary oocyte
clear glycoprotein layer called zona pellucida
whats the zona pellucida
clear glycoprotein layer covering the cell membrane of secondary oocyte
where is the cortical granules
periphery of cytoplasm
what type of mol is cortical granules
secretory organnelles
whats the function of cortical granules
prevent the entry of more than one sperm
what does corona radiata do
surround secondary oocyte and provide nutrients
how would you recognise the pre ovulatory apperance of the ovary
primary follicles develpe intro mature ovarian follicles
how would you recognise the ovulation apperance of the ovary
show a mature ovarian follicle bursting on ovary surface to release the oocyte
