meridional canal situated directly beneath it and a ring of channels surround the mouth.

Sensory organs and combs

At the aboral end of the animal (the opposite end from the mouth) is a statocyst, a balance organ that helps it to orient itself. Papillae surround the statocyst. Their function is unclear, but they are probably also used for sensory perception. The eight combs of cilia extend part way along the body in ribs. The combs are used in locomotion, with the cilia beating in synchronised

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