N=46 diploid
N=23 diploid
Alleles are shuffled and # of chromosomes are halved
2n
N
N
N
N
N
N
Leydig Cells
Annotations:
Situated in between tubles
Produce Androgens
Testosterone
Regulates LH secreation
Negative Feedback
Sperm production
Decreased levels = Andropause
Stimulates
Posterior Piuitary
Women
Key Hormone
Players
Hypothalamus
Anterior
Pituitary
FHS
Overies
ovarian follicle
Maturation of eggs
Meiosis
2N
N
X
X
N
X
N
Produces
estrogen
LH
Releases the
egg
Forms Corpus Luteum
Produces
estrogen
Posterior
Pituitary
Menstruation
The average menstrual cycle is 28
days
Ovulation (the release of an egg)
occurs about halfway through the
cycle (day 14) and the egg then
travels down the oviduct to the
uterus Failure to fertilise the egg
causes menstruation (commonly
called a period) to occur –
this is caused by the breakdown of the thickened lining of
the uterus Menstruation lasts around 5 – 7 days and signals
the beginning of the next cycle After menstruation finishes,
the lining of the uterus starts to thicken again in
preparation for possible implantation in the next cycle