What makes an anus "important"? How about one that can eat and breath as well as expel waste. An anus with teeth. One that can cast a net of organs outward for defense, and also clean the ocean floor. The sea cucumber is pretty much a digestive tract with a bit of an animal wrapped around it. Maybe you could describe all animals that way, but this animal is pretty rudimentary, while the digestive tract is a marvel. -via The Kid Should See This
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