| A | B |
|---|
| testes | male gonads |
| epididymis | storage area inside testes where sperm become mature |
| Vas deferens | tube that carries sperm from testes to urethra |
| urethra | tube that carries urine and, in males, sperm out of the body |
| seminal vesicles, Cowper's glands, prostate gland | secrete fluids into the urethra which nourish and protect sperm |
| semen | mixture of sperm and fluids |
| testosterone | male hormone produced by testes |
| secondary sex characteristics | physical traits appearing in adolescence that are not directly involved in reproduction |
| examples of male secondary sex characteristics | beard, deep voice, muscle development |
| female secondary sex characteristics | breast development, wider pelvis |
| ovaries | female gonads |
| follicles | tiny sacs in ovary where oogenesis occurs |
| approximate number of follicles | 400,000 |
| approximate number of mature eggs produced in lifetime | 500 |
| ovulation | release of mature egg from follicle |
| Fallopian tubes (oviducts) | tubes near ovaries which carry egg cells to uterus |
| uterus | muscular, pear-shaped organ where embryo develops |
| cervix | narrow opening at bottom of uterus |
| vagina (birth canal) | passageway that leads from uterus to exterior of body |
| estrogen | female sex hormone |
| menstrual cycle | hormone-controlled cycle in human female in which uterus prepares to receive egg |
| 28 days | average length of menstrual cycle |
| menopause | the permanent stopping of the menstrual cycle |
| fertilization | uniting of sperm cell with egg cell to produce zygote |
| human chorionic gonadotrophic hormone (HCG) | secreted by embryo to maintain corpus luteum until formation of placenta |
| In vitro fertilization | technique of uniting sperm and egg in glass dish in laboratory |
| placenta | organ that allows contact between mother's blood and embryo's;acts as barrier to some harmful substances |
| gestation | length of pregnancy |
| labor | rhythmic contraction of uterus which dilate cervix and expel baby from uterus |
| delivery | passage of baby through birth canal |
| afterbirth | membranes (placenta,amnion) expelled after delivery |
| navel | scar on baby's abdomen left by umbilical cord |
| premature birth | birth earlier than 9 months |
| caesarian section | incision through mother's abdomen and uterus, made in order to remove baby |
