development of the body

Development is the process in which something grows or becomes advanced. in the medical field, the term development is widely used in embryology. In embryology, development begins when sperm and egg unite and form a zygote. the development in embryology is divided into two classes which are prenatal and postnatal development.

Primitive streak and Sacrococcygeal teratoma

Primitive streak The primitive streak is a structure that forms in the blastocyst during the third week of development. It forms on the caudal end of the embryonic disc. The primitive streak determines the site of gastrulation and initiates the gastrulation. Gastrulation is the process in which three germ layers ectoderm, endoderm, and mesoderm are …

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