The process of reproduction and development follow a orderly sequence of events.

The zygotes that are formed have all of the genetic information that is needed for growth and development of the organism.

After the zygote is fertilized it will go though mitosis and develop and embryo. The fertilization and mitotic division will occur in the oviduct.

The embryo will then move down the fallopian tube and complete most of its development in the wall of the uterus.

The placenta will allow for material exchange (oxygen)between the fetus and the mother, and it is composed of fetal tissue and maternal tissue.

Wastes from the fetus will diffuse to the mother.

The umbilical cord houses the blood vessels that allow materials to be carried from the fetus to the placenta and back again.

There is also fluid, amniotic fluid, that surrounds the fetus. This substance gives protection to the fetus from being physically harmed.

Fetal Development in the Uterus

The embryo will develop into a 3 layered structure = Gastrula

The gastrula will then differentiate into other specialized cells.

ex: outer cell layer of the developing gastrula will develop into the skin and nervous system of a mature human organisms.

Reproduction and Development