DIPLOBLASTIC | TRIPLOBLASTIC |
1) Body wall consists of two major tissue layers. | 1) Body walls consists of three major tissue layers. |
2) They include outer layer (ectoderm), inner layer (endoderm) | 2) They are ectoderm, endoderm and in between them is present the mesoderm. Mesoderm helps to develop true organs. |
3) Eg- jellyfish, sea anemones, corals etc. | 3) Eg- all higher animals from flatworms to humans. |