reproductive system Flashcards
what is the function of the placenta
provides a connection between the foetus and the mother
Provides oxygen and nutrients
Takes away carbon dioxide
Removes waste products from the blood
what does polyoestrous mean
the animal can become fertile more than once a year
what does seasonal polyoestrous mean
have more than one oestrus cycle but only during certain times of the year - horses, sheep, goats and deer
what does monestrous mean
have one oestrus cycle per year - dogs, wolves, foxes and bears
what are the 7 main hormones
progesterone
oestrogen
FSH
LH
oxytocin
prostaglandins
cortisol
what does progesterone do
produced by the corpus luteum, maintains lining of the uterus and inhibits FSH
what does oestrogen do
rebuilds the uterine lining and stimulates release of LH by pituitary
what does FSH do
(follicle stimulating hormone) triggers the growth of eggs in the ovaries and gets the eggs ready for ovulation
what does LH do
(luteinizing hormone) helps control the menstrual cycle. It also triggers the release of an egg from the ovary
what does oxytocin do
produced by the hypothalamus, released by the pituitary gland, stimulates uterine contractions and lactation
what does prostaglandins do
help uterine contraction
what does cortisol do
stress hormone, helps with maternal instinct
what are the 3 layers of the uterus
Perimetrium, Myometrium, Endometrium
what is the perimetrium
the outside layers which supports the structure of the uterus
what is the myometrium
the middle layer which consists of a muscle layers which aids in parturition as it contracts to push out the foetus
