Embryogenesis

Embryogenesis is the process by which a single cell, the zygote, develops into a multicellular embryo. It is a complex process that involves a variety of molecular and cellular events, including the formation of the blastocyst, differentiation of cells, morphogenesis, and the formation of organs and organ systems. Embryogenesis is divided into two main stages: pre-implantation development and post-implantation development. During pre-implantation development, the fertilized egg (or zygote) undergoes a series of cell divisions and changes to form a blastocyst, which is a hollow ball of cells. This is followed by the differentiation of cells into three distinct cell types: the ectoderm, mesoderm, and endoderm. During the post-implantation development stage, these cells differentiate further to form the various organs and organ systems of the body. The process of embryogenesis is carefully regulated by a number of hormones, proteins, and environmental factors, and plays a crucial role in the development of a healthy organism.