The cnidocytes are the cells that produce the nematocysts. These 2 layers are separated by a jelly-like layer called the mesoglea. Within the mesoglea we find a nerve net . These organisms do not contain a brain. . They contain a central cavity called the Gastrovascular cavity.
Digestion takes place here and the contents are absorbed by the endodermal cells.
The undigested food is expelled through its mouth. This is considered a two way digestive process. They contain radial symmetry. Some organisms are sessile while others are free floating. They reproduce by budding and regeneration.