Enterocoely

In enterocoely, a mesoderm (middle layer) is formed in a developing embryo, in which the coelom appears from pouches growing and separating from the digestive tract (also known as the embryonic gut, or archenteron).

[1] As the incipient coelomic epithelium originates from archenteral diverticula, the endoderm therefore gives rise to the mesodermal cells.

[2][3] This refers to the fact that fluid-filled body cavities are formed from pockets related to the embryonic gut.

Enterocoely is the stage of embryological development of deuterostomes in which the coelom forms.

[4] This type of coelom formation occurs in deuterostome animals, which for this reason are also known as enterocoelomates.