Diploblastic Animals: Unveiling the Significance of Two Germ Layers

Structure and Symmetry

Diploblastic animals, characterized by their simple structure and radial symmetry, possess only two germ layers: endoderm and ectoderm.

Implications for Development and Evolution

During gastrulation, the process by which embryonic layers form, diploblastic animals establish these two germ layers. The endoderm gives rise to the inner lining of the digestive system and organs, while the ectoderm develops into the outer covering, including the skin and nervous system. This fundamental organization underlies the diversity of animal life forms.