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There are plenty of body parts we don't need. A few serve no purpose at all, but a body part doesn't have to be completely useless to be deemed unnecessary. Some anatomical features serve a purpose in how the body functions, but not the one for which it was intended. Or, a body part may perform a function unnecessary to survival, so removal would cause no adverse effects.

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1. Vestigial Body Parts

Vestigial organs and body parts are those that are seemingly useless and have no function in the human body. Some scientists believe these features are proof of evolution -- that our ancestors once needed them, but modern man does not. Another school of thought is that we have not yet figured out what purpose these body parts serve.

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