The outermost germ layer in the process of embryonic development is the Ectoderm. This germ layer gives rise to structures such as the nervous system (brain, spinal cord, and peripheral nerves), skin, hair, and nails. The ectoderm is responsible for forming the outer covering of the body and is crucial for sensory perception and protection.
On the other hand, the Endoderm is the innermost germ layer, which gives rise to the lining of the digestive tract, respiratory tract, liver, pancreas, and other internal organs.
Finally, the Mesoderm is the middle germ layer that develops into structures such as muscles, bones, blood vessels, heart, kidneys, and reproductive organs. It plays a fundamental role in providing structural support and enabling movement within the body.
In summary, the ectoderm is the outermost germ layer that contributes to the formation of external structures and certain internal tissues like the nervous system during embryonic development.
