Useless Body Parts

Useless Body Parts
Useless Body Parts
From wisdom teeth to ear muscles to male nipples, the human body has a number of 'useless' parts. Check out these anatomical extras that humans still have but no longer need.Check out these 'useless' body parts and why we have them. Source: Discover Magazine (credit: AP)
COCCYX
COCCYX
The tail bone. The fused bones are all that's left of the tail that most mammals used for balance and communication. Some people think the coccyx helps support organs or that muscles are attached to it, but they can be removed without any health problems. Source: Discover Magazine (credit: AP)
APPENDIX
APPENDIX
It used to help early humans digest all the plant material they ate. Now, more than 300,000 Americans have appendectomies each year. Source: Discover Magazine (credit: AP)
SUBCLAVIUS MUSCLE
SUBCLAVIUS MUSCLE
A small muscle that goes from under the shoulder to the first rib to the collarbone that would be used if we walked on all fours. Some people have one, others don't and some people have two. Source: Discover Magazine (credit: AP)
MALE NIPPLES
MALE NIPPLES
Lactiferous ducts form before the sex of the fetus is determined. Men have the necessary tissue to produce milk. Source: Discover Magazine (credit: AP)
WISDOM TEETH
WISDOM TEETH
Humans used to have to chew a lot plants to get enough food to survive, therefore the extra teeth. Today, only about 5% of the population has a healthy set of Wisdom Teeth. Source: Discover Magazine (credit: CBS)
EXTRINSIC EAR MUSCLES
EXTRINSIC EAR MUSCLES
Three muscles that made it possible for early man to move their ears independently of their heads, the way that dogs and cats can. These muscles are why some people can learn to wiggle their ears. Source: Discover Magazine (credit: AP)
NECK RIB
NECK RIB
A set of small ribs that appear in less than 1% of the population. They can cause nerve and artery problems. They may be leftover from the age of reptiles. Source: Discover Magazine (credit: AP)
THIRD EYELID
THIRD EYELID
Birds have them for protecting the eye and cleaning out debris. Humans still have a tiny fold in the inner corner of the eye. Source: Discover Magazine (credit: AP)
PALMARIS MUSCLE
PALMARIS MUSCLE
A long muscle that runs from the elbow to the wrist. It could have been important for hanging and climbing. 11% of people do not have one. Source: Discover Magazine (credit:AP)
BODY HAIR
BODY HAIR
Eyebrows help keep sweat out of the eyes and women may be attracted by male facial hair, but most of our body hair serves no function or purpose. Source: Discover Magazine (credit: AP)
ERECTOR PILI
ERECTOR PILI
The muscle that allow animals to puff up their fur to keep warm or intimidate predators. Humans sill have them which allows us to get goose bumps. Source: Discover Magazine (credit: wikimedia)
PLANTARIS MUSCLE
PLANTARIS MUSCLE
This foot muscle helps primates grasp with their feet. It's disappeared in 9% of humans. Source: Discover Magazine (credit: AP)
THIRTEENTH RIB
THIRTEENTH RIB
Chimpanzees and gorillas have them. But only about 8% of humans have an extra rib. Source: Discover Magazine (credit: AP)
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