ectoderms

Example:In contrast to the ectoderm, which forms the epidermis and nervous system, the endoderm develops into internal organs and cavities.

Definition:One of the three primary germ layers that forms in the early stages of an animal’s embryonic development, and typically develops into the lining of the digestive and respiratory tracts.

Example:The mesoderm, unlike the ectoderm, generates the body’s skeletal and muscular systems, whereas the ectoderm contributes to the skin and nervous system.

Definition:The middle layer of the three primary germ layers formed during embryonic development and gives rise to the body’s axial skeletal and muscular systems.