Endoderm

Endoderm is one of the three primary germ cell layers in the very early embryo. The other two layers are the ectoderm (outside layer) and mesoderm (middle layer), with the endoderm as the intermost layer. Cells migrating inward along the archenteron form the inner layer of the gastrula, which develops into the endoderm.

The endoderm consists at first of flattened cells, which subsequently become columnar. It forms the epithelial lining of multiple systems.

Read more about Endoderm:  Production, Additional Images

Other articles related to "endoderm":

Enterocoely
... At this point, there are two layers of cells - the ectoderm (outermost) and the endoderm (innermost) layers ... The mesoderm (middle layer) begins to form as two "pockets" of tissue (one above the endoderm, and one below) are formed via folding of the endoderm ... complete layer of tissue right in between the endoderm and ectoderm layers ...
Histogenesis - Germ Layers - Endoderm
... The endoderm is one of the germ layers formed during animal embryogenesis ... along the archenteron form the inner layer of the gastrula, which develops into the endoderm ... Initially, the endoderm consists of flattened cells, which subsequently become columnar ...
Gastrulation - In Amniotes - Loss of Symmetry
... Visceral endoderm surrounds the epiblast ... The distal visceral endoderm (DVE) migrates to the anterior portion of the embryo, forming the “anterior visceral endoderm” (AVE) ...
Gastrulation
... These three germ layers are known as the ectoderm, mesoderm, and endoderm ... The mesoderm is found between the ectoderm and the endoderm and gives rise to somites, which form muscle the cartilage of the ribs and vertebrae the dermis, the notochord, blood and blood vessels, bone, and ... The endoderm gives rise to the epithelium of the digestive system and respiratory system, and organs associated with the digestive system, such as the liver and pancreas ...
Bilaminar Blastocyst - Epiblast Cells During Gastrulation - Definitive Endoderm Development
... slowly becomes replaced by new cells that eventually constitute the definitive endoderm ... The definitive endoderm is what makes the lining of the gut and other associated gut structures ...