Giving Birth and review

I hope you enjoyed this unit. Don't forget the stages of life:

Also, don't forget to review the female and the male reproductive systems. Remember that:

Uterus: It is also called the womb and if an ovum or egg is fertilised it will implant in the wall and develop into an embryo and then a foetus. 

After puberty, an egg or ovum is released from the ovaries (normally from one of the ovaries) once every 28 days. In the ovaries, the ovum is produced. The ovum is the female reproductive cell. 

The male reproductive cell is called the sperm and it is produced in the testicles. 

A zygote is the union of the sperm cell and the egg cell. Also known as a fertilized ovum, the zygote begins as a single cell but divides rapidly in the days following fertilization. After this two-week period of cell division, the zygote eventually becomes an embryo.

Fertilization: The process of combining the male gamete, or sperm, with the female gamete, or ovum. The product of fertilization is a cell called a zygote.

The placenta is a tissue that grows in the wall of the uterus where the embryo has been implanted. The placenta is an organ that develops in your uterus during pregnancy. This structure provides oxygen and nutrients to your growing baby and removes waste products from your baby's blood. The placenta attaches to the wall of your uterus, and your baby's umbilical cord arises from it.

Notice that at the end of the first trimestre, the baby’s brain begins to develop, the heart beats and small buds, that will become the arms and legs, appear. At the end of the first trimester the embryo is called a foetus. It’s now that the organs are formed and begin to function with the exception of the lungs which only begin to function when the baby is born and reaches the outside world.