Purpose of meiosis
reduces chromosomes to 23 singles
Where does this type of cell division occur
at what time during fetal development do the testes descent to scrotum?
7 months, 28 weeks
one or both testes haven't descended
what are the seminiferous tubules
produce sperm cells
What is the function of Leydig (interstitial) cells
What hormone triggers the onset of puberty?
gnRH in hypothalamus
Where are LH and FSH produced
What is the effect of LH in males
stimulates secretion of testosterone
What is the effect of FSH in males?
stimulates sperm production
Where do sperm mature
Parts of the spermatic cord
Blood vessels, pampiniform plexus, nerves, lymphatics, cremaster muscle, dartos muscle, vas deferens
Hormone responsible for secondary sex characteristics
Accessory sex glands and function?
seminal vesical, prostate gland, bulburethral gland,
all contribute to ejaculatory fluid
Parts of urthrea
bladder, prostatic urthrea, membranous, spongy/penile
What is the erectile tissue in penis?
Function of corpus spongiosum
make sure urethra stays open in erection
ANS is associated with erection of penis?
ANS associated with ejaculation?
first menstrual period
lack of menstruation
days 1-6, blood supply to endometrium cut off,
endometrium dies off,
Ovary- follicles begin to develop
Follicular (pre ov)
days 7-14, Uterus- repair & regeneration of endometrium, due to influence of estrogen,
Ovary- follicle developing
14th day, Ovary- surge of LH causes ovulation of oocyte from follicle
Luteal (post ov)
days 14-28, Uterus- continued to repair of endometrium due to progesterone, still estrogen
Ovary- remnant of follicle becomes corpus luteum, secretes progesterone
What is corpus luteum
the follicle remains that the egg came from, secretes progesterone
Where does fertilization normally occur?
What is an ectopic pregnancy
fertilized egg stops in fallopian tube
what happens at the end of the cycle if fertilization occurs?
HCG from fetal membrane keeps corpus luteum alive, progesterone produced still
what happens at the end of the cycle if fertilization does not occur?
not preg, Corpus luteum dies, progesterone decreases, vasoconstriction to endometrium, it dies, cycle repeats