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human reproduction36

TermDefinition
gonads gamete producing organs: ovaries: females: produce eggs. Testes: males: produce sprem
ovaries secrete the hormones estrogen and progesterone
testes secrete a group of hormones call testosterone
male puberty voice deepens, chest broadens, and more hair: produce sperm
female puberty beast grow, hip widen for child birth menstruation begins: ovulates or releases egg
major function of a male reproductive system produces, stores, and releases the male gamete sperm
sperm to move and carry genetic information to the egg
scrotum pouch that holds testes away from the internal body heat; more sperm are made at a lower tem.
penis external portion of themale system: contains spongy tissue that becomes turgid and erect when filled with blood
semen (4 parts) 1.) 2% sperm (25 million made a day) 2.) seminal vesicles: rich in fructose, provides energy 3.)prostate gland: lubrication through the canal 4.) cowper's gland: protection from female acidity
ejaculation strong muscular contractions of the sperm ducts; 300-500 million deposited each time
hormones the hypothalamus and pituitary gland secrete the hormones FSH Follide-stimulating hormone and LH:luteinizing hormone that is transported to the testis and cause the production of sperm cells
oocytes egg 75,000 larger than a sperm; born with 400,000 eggs, but ony 400 end up maturing
ovaries store and produce eggs
fallopian tubes carries eggs from ovary to the uterus. site of ferilization
uterus muscular structure that functions to house the developing fetus
cervix muscle that seperate the uterus and vagina
vagina organ that receives the male species organ
flow if egg isn't fertilized the corpus luteum stops releasing progesterone and the uterine lining is expelled with the blood and unfertilized egg
follicular phase FSH- cause a follicle to form around the egg: produces estrogen which stimulates the lining of the uterus to thicken. LH- lutenizing hormone: maturation of the egg
ovulation egg is matured; ovary ruptures releasing the mature egg into the fallopian tube
luteal phase ruptured follicle develops a corpus luteum around it which has the brain release more estrogen and progesterone to build uterine lining
chorion possess small, finger like projections called chorionic villi- food and oxygen are exchanged through this membrane
placenta area where the chorionic villi meet the maternal blood supply
amnion fluid filled sac that surrounds the developing fetus, cushions and protects
allantois surrounds the embryo lengthens to become the umbilical cord
1st trimester 1st 3 months the organ system forms, embryo is sensitive to drugs and alcohol, most dramatic change
2nd trimester month 4-6 mothers abolomen begins to swell, skeleton forms, begins to wake and sleep, move about
3rd trimester last 3 months fetus becomes modified to survive outside the womb, can see light and dark, reacts to sound, learning may take place
labor pituitary gland of fetus, prostaglandins in the fetal membranes, and glands within the mother releases hormones which initiate childbirth
dilation oxytocin in mother relaxes uterine muscles, dilates cervix water breaks- amniotic fluid is released
explusion muscular contractions force the baby throught the birth canal
placental stage after birth- remains of placenta and amnion released 10 minutes later
infancy first 2 years, tremendous growth, increases coordination
childhood age 2 to 10-14, steady growth, mental ability to reason and problem solve
adolescnece growth spurt, maximum physical stature, physical growth ends
adult metabolism and digestion slows, skin loses elasticity
Created by: smalls_jess
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