Definition of Triploblastic

Triploblastic refers to animals that develop three distinct germ layers during embryonic development: the ectoderm, mesoderm, and endoderm. The ectoderm forms the outer layer, giving rise to skin and nervous system. The mesoderm forms the middle layer, developing into muscles, bones, and circulatory system. The endoderm forms the inner layer, developing into the digestive and respiratory systems.