reproductive system
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Y chromosome genes
• SRY; formation of testes • house keeping genes (puberty and testostorone production) • sperm production
how is sex inherited
XX or XY
scrotum
external sac containing testes (keep them 3c below body temp for optimum sperm production)
testes
contains seminfierous tubules which produce spermatazoa
penis
organ that introduces sperm int ovagina and contains erectile tissue that stiffens with blood
vas deferens
sperm duct that connects penis to testes
epdidymis
storage and maturation of sperm
urethra (men)
tube for semen and urine
seminal vesicle
produces mucus secretion that helps sperm movement
prostate gland
produces alkaline solution to neutralize urine in urethra and aid sperm movement
ovaries
produce egg/ovum which develop into follices produce oestrogen and progesterone
fallopian tubes
eg travels down tube to uterus, fertilization occurs here around the 3rd day
uterus
site of implantation and embryo development. Muscular walls and mucous membrane
endometrium
mucous membrane, well supplied with blood, where embryo implants itself
vagina
site of penis acceptance and opening into the uterus through the cervix
urethra (women)
separates tube for woman, expells urine from bladder
invitro fertilization
• test tube babies • FSH given to women to stimulate ovum production • ovum surgically harvested and mixed with sperm in petri dish • embryo that develops is placed into uterus • for women with blocked ovaries/ men with low sperm count