| A | B |
|---|
| Gamete | sex cell = sperm and egg |
| Ovary | produces egg and estrogen |
| Testes | produces sperm and testosterone |
| Zygote | fertilized egg |
| Embryo | developing human during the first 8 weeks after fertilization |
| Fetus | developing human between 8 weeks and birth |
| Uterus | where the fetus develops |
| Placenta | reproductive tissue that nourishes the fetus |
| Internal Fertilization | process of the sperm and egg joining inside of a body |
| Internal Development | process of fetus development that happens in the uterus |
