| A | B |
|---|
| sperm | the male sex cell |
| testes | the primary male reproductive organs, which produce sperm cells and testosterone |
| penis | the male organ that transfers sperm to a female and that carries urine out of the body |
| egg | a sex cell produced by a female |
| ovary | in the female reproductive system of animals, an organ that produces eggs |
| uterus | in female placenta 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 first division after 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 |
| umbilical 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 |
