Child De: Chapter 4

4. Every person is born with 46 ____
6. Genes are made up of a complex molecule called ___
8. The developing baby is known as an _____ from about the third week to the eighth week of pregnancy
9. The ____ is rich in blood vessels and attaches to the uterus wall. It absorbs the food and oxygen from the mother and gives it to the baby
10. The ____ connects the baby to the mother
11. ___ is when the lining of the uterus has thickened enough to provide a place for the zygote to attach itself to and continue to grow. The zygote is only the size of the head of a pin
13. The first stage of pregnancy is known as the ___ stage
14. ____ lasts about 28 days when an ovum is released by one of the two woman’s ovaries
15. The position in which the baby begins to move into as it grows and develops

1. The male cell
2. ____ occurs when sperm reaches the fallopian tubes; it may penetrate and fertilize the ovum
3. Sac A sac that fills with fluid and surrounds the embryo
5. An egg cell
6. The ____ gene is the stronger gene
7. The baby is known as a ____ during the final stage of pregnancy
12. The inability to become pregnant