Dentist specialties are recognized in those areas where advanced knowledge and skills are essential to maintain or restore oral health. The list of recognized dental specialties differs from country to country.
In contrast, radially symmetrical animals like jellyfish have a topside and a downside, but no identifiable front or back. The bilateria are a major group of animals, including the majority of phyla but not sponges, cnidarians, placozoans and ctenophores. For the most part, bilateral embryos are triploblastic, having three germ layers: endoderm, mesoderm, and ectoderm.
An animal with radial symmetry could be divided into equal portions from the center, in the same way that you could cut a pie into wedges. An animal with radial symmetry really has no right and left side or head and rear end.Radial symmetry is ideal for animals that do not move, so they can reach into their environment on all sides. Consider the starfish as an example of radial symmetry.nimals With Radial Symmetry. Animals with radial symmetry tend to have a surface that contains a mouth at the center, and they can reach out in all directions to gather food for that mouth. They can be attached to a substrate, like the sea anemone, or floating, like jellyfish.