| A | B |
| embryo | the young in the womb up to the early part of the third month of development |
| umbilical cord | blood vessel which transmit nourishment from the uterus walls to the unborn baby. |
| conception | the fertilized egg, the beginning of a neew individual |
| fetus | the young in the womb from the latter part of the third month of development until birth |
| placenta | the connecting tissue formed in the lining of the uterus that provides for the nourishment of the fetus that provides and the elimination of its waste products |
| zygote | the beginning of pregnancy |
| fallopian tube | either of a pair of slender tubes that transports the egg to the womb |
| womb | the uterus |
| ovum | female egg cell |
| sperm | make sex cell |
| conception | fertilization of egg with sperm |
| chromosome | a tiny rodlike body in nucleus, unit of heredity |