Gastrulation and Germ Layer Formation

1. Gastrulation and Germ Layer Formation The gastrula refers to an animal embryo with a double germ layer or a triple germ layer, an important stage in the development of animal embryos. It is derived from the development of blastocysts. Part of the cells of the blastocyst migrates to the interior by various means to form the gastrula of the double or triple germ layer. Lower animals such as coelenterates consist of only two germ layers; many higher animals form mesoderm between the meat ectoderm. The cavity surrounded by endodermis called the gut lumen. The migration of cells in gastrulation is called the gut effect. There are various ways, such as inset, outsourcing, stratification, migration, concentration, and extension. During this period, the nucleus began to play a leading role in the synthesis of new proteins, and the cells differentiated significantly, laying the foundation for tissue development and organogenesis. Gastrulation is a stage that most animal embryos experience. At this stage, only one layer of blastocysts recombines to form a gastrula containing three germ layers (ie, ectoderm, mesoderm, endoderm) cells. The gastrulation occurs after the cleavage. After the formation of the gastrula, the embryo enters the gastrula and begins the organogenesis process. The newly formed cells of the three germ layers will combine and develop into organs.