Question

Do humans start as a single cell?

Answer 1

Development of humans:

1. In humans, an embryo is formed after the egg is fertilized by the incoming sperm.
2. The fertilized ovum is referred to as a zygote and is composed of a single cell. Thus, humans begin as a single cell formed by the union of sperm and ovum.
3. The cell then divides rapidly undergoes division and forms a cluster of cells known as the blastula.
4. After a specific time period of four days, the cells begin to differentiate and develop to perform specific functions.
5. The division of cells in the zygote gives rise to the embryo.