We should not always assume that every human development has an adaptive explanation. Because of the complexity of evolution, the human body still sustains a few reminisce of our ancient lives.
Here are some useless human body parts that serve very little or no purpose in our survival.
Primitive humans were largely vegetarians, food gatherers, helping digestion of food appendix. Located in a pouch like structure between the large and small intestine, appendix, mainly cellulose and the latter possibly also eat the white blood cells. While speaking appendix inflammation - lie dormant, Appendix because can cause a host of problems such as kidney stones can be affected. It causes abdominal pain, loss of appetite, nausea, etc. But time is often decreased symptoms.
Otherwise, tailbone called our pre-historic ancestors believed that the rest of the body part. Also found in monkeys, Coccyx is the last executed segment of our vertebral column. It consists of three to five first vertebrae.
Why did we all need once in ancient times? Scientists tail between our structure and balance, but we've helped since humans learned to walk upright believe, tail gradually ceased to exist leaving only a speck of reminder hanging useless. But since the end of the tailbone any calm is associated with a number of complex and ligaments, muscles and tendons.
8. Paranasal Sinuses
Mainly found around the nasal cavity filled with air in the face of human sinuses are spaces. What is the purpose of their existence is still subject to much debate, but causes more pain when hit our sinuses. The paranasal sinuses Bow hunting is allowed on the basis of our ancestors to survive daily and were responsible for the strict sense. However, a few possible actions like some paranasal sinuses add resonance to our voice is believed, may cause inflammation of the nasal sinuses pressure control on irrigation and causing cancer weight of our skull Light.
Other, adenoid tonsil, two of Palatine glands than the mass of tissue located on either side of the back of the throat, there are a number of linguistic Tonsil glands and other glands like two Tubal. The neck glands inhaling foreign pathogens and help protect against throat indigestion, but most of the time they prove to be more dangerous than beneficial. Embrace the gland can lead to a host of infections are more prone to problems and sometimes may require surgical removal.
6. Arrector Pili Muscles
arrector Pili muscle causes the phenomenon we refer to as the goose bumps. When contracts are tiny muscles attached to hair follicles, which causes our hair to stand. The goose bumps are a defense mechanism in animals. When fears arise over the hair to make it big in the hope of stopping these predators. arrector Pili muscle can not be consciously controlled. Some experts have come up with a goal to maintain muscle contraction and their legal stay in our body hair removal and help trap heat within our bodies. But since the human body thermal insulation to allow relatively little hair, it falls kind of flat proof.
5. Wisdom Tooth
Third molar, which was useful for our ancestors out of the wisdom tooth grinding down plant tissues, is said to have developed between age 17 and 25 researchers. But our skulls are smaller and due to the decline in the number of teeth are no longer needed. Change of diet could still not completely get rid of the third molar or wisdom tooth. It's a painful way to remove an infected wisdom tooth.
4. Palmaris Longus Muscles
A totally useless stretches the muscles of the flexor carpi ulnaris and the flexor carpi radialis. About 14 percent of the world's population has no Palmaris Longus muscles but does not affect grip strength. This long, narrow muscle was useful once had to climb with our father, grandfather's hand. Flexing the wrist and thumb and fifth finger touching the pad can feel a muscle. This is why medical students sometimes mistake it for a nerve which can be felt palpitating.
3. Plica Semilunaris of Conjunctiva
semilunaris the plica is also called third eyelid, in the corner of our eye for the tear duct. This is a small folded piece featured when we move our eyes. semilunaris the plica eye tear is said to help maintain drainage and allows free rotation of our eyes. Semilunaris limited our eye movements without plica will be connected directly to the eyeball is the conjunctiva, they will. But it was not because of the quiet character of its small size. The existence of semilunaris the plica is absolutely essential to our survival.
2. Subclavius Muscle
Subclavius small triangular muscle fat tendon that stretches between the first rib and collarbone us. Lying down on our shoulders, bend our shoulders muscle, falling forward and helps carry our shoulders. Subclavius muscular man walked around humans, but it was useful. Today much of it is not very good use. I have not found any muscle, just absolutely nothing, nothing and nothing.
1. Male Nipples
Nipple is set to develop into a fetus gender even before that. Testosterone is the male on the 6th week of the hormones that begin to take shape. Male nipples off for further development at this stage, but sometimes the fat tissues around their breasts swell and her nipples are becoming apparent as well. Pubescent boys, high levels of estrogen can cause swelling around the nipples to make them look bigger. Although functionless, male nipples are very sensitive and can develop breast cancer.