what are triploblastic animals
During the development of embryo, there occurs a stage blastula, which is followed by gastrulation, during which germ layers are formed.Those having three germ layers - ectoderm, mesoderm and endoderm, are knows as triploblastic animal.The word itself is self explaining, tri- means three, and blastic- during blastula stage, i.e, 3 layers at blastula stage.
Describing an animal having a body composed of three embryonic cell layers: the ectoderm, mesoderm, and endoderm. Most multicellular animals are triploblastic; the coelenterates, which are diploblastic, are an exception.
HOPE THIS WOULD BE HELPFUL