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Radial symmetry can be defined as the body plan of those animals, which can be divided into two equal halves if they are cut through any of the radial planes.
Body symmetry stands for the characterization of body plan and can be defined as the similarity of parts in different regions and directions of the body. Based on symmetry, the animals can be divided into asymmetrical, radially symmetrical, and bilaterally symmetrical animals. Animals that cannot be divided into two equivalent halves through any plane are described as asymmetrical animals, e.g., sponges, adult snails, etc. Animals that can be divided into two equivalent halves if they are cut through any of the radial planes are described as radially symmetrical animals, e.g., jellyfish, corals, sea anemones, etc. Animals which can be divided into two equal right and left halves only if they are cut in the vertical plane passing through their median longitudinal body axis, e.g., flatworms, earthworms, and...
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