Animals in which the cells are arranged in two embryonic layers are called
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Diploblastic Animals
The animals in which the cells are arranged in two embryonic layers are known as or named diploblastic animals.
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The body walls of all animals are generally formed of two or more embryonic layers. On the basis of the number of embryonic layers present, the animals are classified as follows:
1. Diploblastic Animals
Those animals whose body cells consists of mainly two embryonic layers are termed as diploblastic animals. The outer embryonic layer of such animals are called ectoderm whereas the inner embryonic layer is termed endoderm.
2. Triploblastic Animals
On the other hand, there are animals, the body cells of which consists of three germinal layers, such animals are named as triploblastic animals. The layers present in such animals are named as ectoderm, mesoderm and endoderm.
The animals in which the cells are arranged in two embryonic layers are known as diploblastic animals. Dipoblastic animals are the animal which has a body wall composed only of two layers namely ectoderm and endoderm, sometimes with a noncellular mesoglea present between them. Coelenterates are dipoblastic animals.