Part 4/9:
At the end of gastrulation, organogenesis begins—a phase where the three germ layers differentiate into specific tissues and organs. This process persists from the conclusion of gastrulation until birth, with each germ layer giving rise to particular cell types:
Endoderm: Forms internal structures such as the lungs, thyroid gland, and pancreas.
Mesoderm: Gives rise to muscles, bones, kidneys, red blood cells, and the cardiovascular system.
Ectoderm: Develops into the outer layer of skin, neural tissues, and pigment cells.