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Reproductive System (Hormones of the reproductive system: (Follicle…
Reproductive System
Hormones of the reproductive system:
Follicle Stimulating hormone (FSH)
: development and maturation of primary follicle into secondary follicle; sperm production&maturation,& inhibin.
Luteinizing Hormone (LH)
: spike; trigger ovulation of the most mature follicle (Only One); stimulates seminiferous tubules to secret testosterone.
Gonadotropin releasing hormone (GnRH)
: released by hypothalamus; stimulate anterior pituitary gland to release LH and FSH (same as males).; triggered by low levels of testosterone, controlled by negative feedback
Progesterone
: suppression of the hypothalamus from releasing GnRH.
testosterone
: stimulates reproductive organ development & sex drive (male & female)
Inhibin
: decrease release of FSH; released by testes when high levels of testosterone are present; STOP production of LH & FSH
Major Functions of the Reproductive System:
Ovaries are located for developing the mature ovum
Fertilization occurs in the uterine tube
male reproductive system produce & disseminate a large quantity of male gamete (sex cells = sperm)
goal is to produce sperm and deliver to the egg
Anatomy of male and female reproductive system & their functions:
Testes
: primary organ sex
Sperm
: male gamete primary
Ovaries
: primary female sex organs
Ductus System
: delivery of female gametes
Events of the female hormonal cycles (3):
Follicular Phase
: beginning of menstruation until ovulation; FSH; Follicular cells secrete estrogen
Ovulation
: day 14; spike increase in LH; releases the oocyte; rise in progesterone
Luteal Phase
: follicle expels the oocyte, the empty shell becomes corpus Luteum; progesterone, some estrogen, and inhibin which surpasses FSH
Disorders of the reproductive system:
Eggs die 24 hours after ovulation
Environmental threats can alter normal spermatogenesis and fertility
if sperm unaffected, toxic substances carried in a man's semen may be transferred to a women, increasing the risk of birth defects, miscarriage, and stillbirths