ANATOMY

Detailed explanation-1: -An embryo is an initial stage of development of a multicellular organism. In organisms that reproduce sexually, embryonic development is the part of the life cycle that begins just after fertilization of the female egg cell by the male sperm cell.

Detailed explanation-2: -The early stages of embryonic development begin with fertilization. The process of fertilization is tightly controlled to ensure that only one sperm fuses with one egg. After fertilization, the zygote undergoes cleavage to form the blastula.

Detailed explanation-3: -An embryo (Greek: , plural ) is a multicellular eukaryote organism in its early stages of development. In humans and most mammals, an embryo is carried in the mother’s womb, while in vertebrates such as birds, the immature organism develops within the confines of an egg.