Triploblasts are organisms that develop from three primary germ layers: the ectoderm, mesoderm, and endoderm. These layers give rise to various tissues and organs in the body. Most animals, including humans, mammals, and birds, are classified as triploblasts, which allows for more complex structures compared to diploblasts, which only have two layers. The three germ layers serve distinct functions. The ectoderm forms the outer layer, developing into the skin and nervous system. The mesoderm creates muscles, bones, and the circulatory system, while the endoderm forms internal organs like the digestive tract and lungs. This layered organization is crucial for the development of more advanced body plans.