The five-toothed sea cucumber is about 10 inches in size and are named after their cucumber like look. Though they do not have a brain their nervous system consists of a ring of nerves where it connects to their tentacles. Their body only has a few areas that are able to detect light and have a sense of touch. The five-toothed sea cucumber can also function without its nervous system showing that its nervous system is just an extra helper when it comes to living. It is not a necessity.
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