Question

Development of Human embryo diagram

Answer 1

Embryonic development, also known as embryogenesis, is the biological development of an embryo. In mammals, the term refers chiefly to early stages of prenatal development, whereas the terms fetus and fetal development describe later stages.Embryonic development starts with the fertilization of the egg cell (ovum) or egg by a sperm cell, (spermatozoon). Once fertilized, the ovum is referred to as a zygote, a single diploid cell. The zygote undergoes mitotic divisions with no significant growth (a process known as cleavage) and cellular differentiation, leading to development of a multicellular embryo.

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