| Questions | Answers |
|---|---|
| The union of a male and femal sex cell is called | fertilization |
| When the zygot attaches to the uterine wall | implantation |
| Name given after 3-8 weeks | embryo |
| Name given after 8th week | fetus |
| Tissue that surrounds and protects embryo | amniotic sac |
| Connects embryo to mother's placenta | umbilical cord |