A diploblast is an organism that develops from two primary germ layers: the ectoderm and the endoderm. These layers give rise to various tissues and organs in the body. Diploblasts are typically simpler in structure compared to triploblasts, which have a third layer called the mesoderm. Common examples of diploblasts include cnidarians like jellyfish and corals. Diploblastic organisms usually exhibit radial symmetry, meaning their body parts are arranged around a central axis. This body plan allows them to interact with their environment from all sides. The presence of only two germ layers limits the complexity of their body structures and functions compared to more advanced organisms.