The human body is a complex system, involving among many other things parts or parts that interact to allow not only exist but also operate and interact with the world. They are fundamental: if one of them fails, the whole body is affected in normal operation.
However, there are exceptions; here are five parts of the human body, at least in appearance, have a role to play.
-Appendix: Surely one of the most common and less dangerous is the appendectomy surgery, which involves the removal of the appendix. When this body becomes inflamed, it can burst, causing serious infections and death from peritonitis. Scientists believe that this is the derivation of an organ, whose value was lost sometime in the evolutionary process.
-Pezones Male: female of the human species use their nipples to feed babies, something that does not happen, of course, with the males, who do not use their nipples at all. However, man is born with them, since their formation process occurs some time before the sexes differ, during the embryonic stage.
Corporal -Vello: appeared in large volume from sexual maturity, the hair of men and women have virtually useless except for those working in daily waxing. Yes served during earlier developmental levels, to shelter the human species and, in the case of males, females compare. Today, only the eyebrows and eyelashes protect eyes allow perspiration falling over his forehead, or the intrusion of dust particles, respectively.
-Muelas Trial: in general, to the ten-year-old man already has his permanent teeth. However, during adolescence, burst-called 'wisdom teeth', four molars that, far from having any use, causing some ailments and disorders. When there is not enough room to accommodate them in the mouth of a patient, dentists choose to remove them.
-Cóccix Or coccyx: in the prehistory of the species, humans counted with a kind of tail, which helped balance. Today, only became of that limb coccyx, i.e., the last vertebra of the spine. Many people argue that even works with the body's balance, but are those who claim that only serves to generate pain, every time we fall sitting.
Source: Curious Eye
