the reproductive system Flashcards
in the female reproductive system:
what are the three layers of the uterus?
perimetrium
myometrium
endometrium
in the female reproductive system:
what does the perimetrium do?
supports the shape of uterus
in the female reproductive system:
what does myometrium do?
muscular layer which contracts
in the female reproductive system:
what does the endometrium do?
inner layer where implantation occurs
what are the three oestrous cycles?
polyoestrous animals
seasonally polyoestrous animals
monooestrous animals
what does mean if an animal is a polyoestrous animal?
they become fertile more than once a year
what does mean if an animal is a seasonally polyoestrous animal?
they have more than one oestrous cycle but only during certain periods of the year
what does mean if an animal is a monooestrous animal?
they have one oestrous cycle every year
what are the four main stages of the oestrous cycle?
diostrous
pro-oestrous
oestrous
metoestrous
in the oestrous cycle:
what happens in the dioestrous stage?
levels of progesterone peak
in the oestrous cycle:
what happens during the pro- oestrous stage?
follicle enlarges
decrease in progesterone levels leads to an increase in oestrogen levels
GnRH is released
in the oestrous cycle:
what happens during the oestrous stage?
increases along with LH and FSH leading to ovulation
in the oestrous cycle:
what happens during the metoestrous stage?
the corpus luteum starts to decay
progesterone levels increase
oestrogen release is inhibited, and levels drop
what happens during fertilisation?
when the DNA from two gametes combines
what happens during implantation?
when a fertalised egg attaches itself to the lining of the uterus
