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20 Cards in this Set
- Front
- Back
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Define Sexual
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requires a male and female cell to unite into one.
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Define Asexual
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when an organism reproduces by simply dividing into 2 cells.
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Define Ovulation
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When a matures Ovum is released.
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Define Menstruation
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in the absence of hormones endometrium deteriorates & comes off with a small amount of blood as the menstrual flow, happens about the 28th day.
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What do Ovaries produce?
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Ovum, secrete the hormones estrogen and progesterone
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How is the sex of the fetus determined?
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spermatozoan carries a X chromosome the embryo will develop female. if carries a Y chromosome the embryo will develop male
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Define Maternal
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(Identical) one ovum is fertilized by one sperm a cell division forms 2 independent groups of cells.
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Define Fraternal
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when 2 ova discharge and each is fertilized.
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Define Siamese
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congenitally united twins, may share some internal organs.
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Expain what takes place in the first trimester of pregnancy.
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after 8 weeks the embryo is called a fetus, after the 10th week all systems are completed and some have limited function.
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Explain what takes place in the second trimester of pregnancy.
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week 14 movement can felt and the heartbeat is detectable with a stethoscope. week 20 fetus opens its eye's and by week 24 the fetus can hear sounds from inside the uterus.
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Explain what takes place in the third trimester of pregnancy.
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after 7 months the fetus assumes a head-down position and has a 50% chance of survival if born. odds increase to 95% at 8 months when weight reaches 5 pounds. odds are increased at 9 months with an average weight of 7 1/2 lbs. and a length of 20 inches.
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Define Infertility
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inability to become pregnant afte 1 year of sexual intercourse without the use of birth control.
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What is the main function of the testes?
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produce sperm and testosterone
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Define Impotence
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erectile dysfunction, the inablity to maintain an erection to complete intercourse.
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Define Vasectomy
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surgical sterilization prohibits ejaculation.
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Define Fertilization
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milliions of sperm are deposited in the female, sperm travels to outer third of fallopian tube. Sperm meets ovum and penetrates the covering of the ovum. zygote is formed and genetic determination is complete. zygote then travels to the uterus about 6 day's after ovulation.
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What is the main function of the uterus?
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during pregnancy the walls stretch to accomodate the fetus.
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What are the signs of pregnancy?
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missed menstrual period, breast tenderness, morning sickness, frequent urination, fatigue and by the 6th - 8th week pregnancy can be detected by manuel pelvic exam & bluish hue of formerly pink cervix.
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Name 5 methods of contraception
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IUD, Diaphragm, Spermicide, Male Condom and female condom.
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