Science 7th Grade - Chapter 18
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15 terms
Terms | Definitions |
|---|---|
 testes | the primary male reproductive organs, which produce sperm and testosterone |
| penis | the male organ that transfers sperm to a female and that carries urine out of the body |
| ovaries | in the female reproductive system of animals, an organ that produces eggs |
| uterus | in female placental mammals, the hollow, muscular organ in which an embryo embeds itself and develops into a fetus |
| vagina | the female reproductive organ that connects the outside of the body to the uterus |
| embryo | in humans, a developing individual from fertilization through the 10th week of pregnancy |
| placenta | the partly fetal and partly maternal organ by which materials are exchanged between a fetus and the mother |
| umbical cord | the rope-like structure through which blood vessels pass and by which a developing mammal is connected to the placenta |
| fetus | a developing human from the end of the 10th week of pregnancy until birth |
| cancer | a tumor in which the cells begin dividing at an uncontrolled rate and can become invasive |
| infertility | -the inability to conceive a child -sometimes STDs and cancer can cause this |
| infancy | -lasts from birth to Age 2 -Growth is very rapid at this stage |
| childhood | -lasts from age 2 - puberty |
| adolescence | -lasts from puberty to the beginning of adulthood |
| pregnancy | in medical practice, the period of time between the first day of a woman's last menstrual period and the delivery of her baby (about 280 days, or 40 weeks) |
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