Question

What are the 3 stages of embryonic development ?

Answer 1

Human Embryo’s Development refers to the Human embryonic growth and creation. This is distinguished by the cell division process and embryos cellular differentiation takes place in early stages of embryonic development.

Complete answer:
Prenatal Development is the process , a baby develops from a single cell after conception into an embryo and later a fetus . Prenatal development is the process of rapid growth that occurs within 40 weeks prior to the birth of a child.

There are three stages of Embryonic development :
1. Germinal stage 1-2 weeks
2. Embryonic stage 3-8 weeks
3. Foetal stage from 9 months until birth.

Germinal stage : In this stage the development that occurs from Conception to implantation of Zygote . The Conception occurs when a sperm fertilizes an egg and forms a Zygote. During this time the organism begins the cell division and growth .
Embryonic stage : This stage begins with the third week after conception. During this period the mass of cells are formed and become distinct as a human. This stage plays an important role in the development of Brain. After conception of four weeks , the neural tube forms.
Foetal stage : This period of development begins during the ninth week and lasts until birth. Once the cell differentiation is completed , the embryo enters the next stage and becomes a fetus. During this foetal period , the prenatal develops and makes important changes in the brain.

Note: The early stage of Embryonic development begins with fertilization . After the fertilization process , the zygote undergoes cleavage to form blastula . The blastula is the hollow ball of cells ,undergoing a process called gastrulation, by which three germ layers are formed. The cells present in the germ layer differentiated into tissues and organs .