| A | B |
|---|
| embryo | the developing young after it has attached itself to the uterus |
| fetus | the offspring after fertilization of the egg but before birth; the last part of the development of the embryo |
| menopause | the time in a woman's life when she stops menstruating |
| mentsruation | the monthly shedding of blood from a woman's uterus |
| ovaries | the female organs that make egg cells and hormones |
| oviducts | the tubes through which egg cells travel to the uterus |
| ovulation | the monthly release of an egg cell from an ovary |
| penis | the male organ the delivers sperm to the female |
| placenta | the structure through which food, oxygen, and wastes pass between the mother and the embryo |
| semen | the mixture of fluids in which sperm leaves the body |
| testes | the male organ thta make sperm cells and hormones |
| urethra | the tube through which urine (and in males, also sperm) leaves the body |
| vagina | the canal that leads to the uterus |
| zygote | the cell that forms right after the egg cell has been fertilized |
