Ectoderm vs. Endoderm — What's the Difference?

The ectoderm is one of the three primary germ layers formed in early embryonic development. It is the outermost layer, and is superficial to the mesoderm (the middle layer) and endoderm (the innermost layer).

Endoderm is the innermost of the three primary germ layers in the very early embryo. The other two layers are the ectoderm (outside layer) and mesoderm (middle layer), with the endoderm being the innermost layer.

The outermost of the three primary germ layers of an embryo, from which the epidermis, nervous tissue, and, in vertebrates, sense organs develop.

The innermost of the three primary germ layers of an animal embryo, developing into the gastrointestinal tract, the lungs, and associated structures. Also called hypoblast.

The outer layer of a diploblastic animal, such as a jellyfish.

One of the three tissue layers in the embryo of a metazoan animal. Through development, it will produce the digestive system of the adult.

(biology) Outermost of the three tissue layers in the embryo of a metazoan animal. Through development, it will produce the epidermis (skin) and nervous system of the adult.

The inner layer of the skin or integument of an animal.

The outer layer of the blastoderm; epiblast.

The inner germ layer that develops into the lining of the digestive and respiratory systems

The outer germ layer that develops into skin and nervous tissue