How are cnidarian bodies arranged around a central axis?

Cnidarians exhibit radial symmetry, meaning their body parts are arranged symmetrically around a central axis. In this arrangement, the body typically takes on a cylindrical or bell-like shape, with various structures radiating outward from the center.123

This radial organization allows for a body plan where the animal can be divided into equivalent halves by any plane passing through the central axis from top to bottom. Because of this symmetry, cnidarians lack cephalization—the concentration of sensory organs in a head—and instead possess tentacles arranged around the circumference of the body, enabling them to intercept food or stimuli from all directions.312