Nature sometimes presents a man of surprises that it would be better and it was not.This abnormal development arising in the process of division of the ovum.One example - Craniopagus parasiticus when the head is normal development of the child grows a second head without a body.
As the fetus develops normally?
Pregnancy is still the most studied and at the same time the most mysterious process, interested scientists around the world.Fetal development is studied in stages, days and even minutes, but until now no one knows how and why there are failures of this amazing process.
head and body begin its development from the first minutes after fertilization.To see the head of the fetus can already at 4-6 weeks, when its length is less than 7 mm.At week 8, when fully formed person, the size of the head is almost equal to the size of the trunk.In week 9, with the help of special devices you can already hear the heartbeat, but to full maturity is still very far away.Even a full fetal movement the mother feel in just 10 weeks - 19 weeks after fertilization.
Why do I get a second head?
fertilized egg is called a zygote.This is the beginning of all beginnings - the fusion of genomes of father and mother, a full chromosome set.Most often, the zygote begins to evenly share immediately after the formation.But sometimes, for some reason, the zygote splits into 2 or 4 parts.Each part begins an independent division.Since monozygotic formed, that is formed from a common cell, conjoined twins.
adhesions can be very different.If the fuse head is Craniopagus parasiticus, torso - torakopagi spine - ischiopagus and so on.Until some time both of the twins are alike, then one part of the development stops and just a parasite on the other, using the general circulation.
How is life conjoined twins?
much worse than the normal child.It is initially disabled, forced to live together at the whim of nature.Craniopagus parasiticus - the most complex cases, because it is not always possible to separate the unnecessary head surgically.The second head also lives can sometimes smile or blink, feels pain and reacts to stimuli.In the two heads has to overall brain and therefore change the nature of the surgeon can not.
The most amazing thing is that an extra head has a face, and it is not always like a major.Still, the development of part of the zygote is a little different, with different speeds and their features, and therefore obtained a large difference.The face on the head more often like a caricature of this Craniopagus parasiticus cause emotional rejection of others.
most famous two-faced man
It Edward Mordake, the heir to the British peers, one of the richest families in Britain.His fate was tragic.He took his own life at a very young age.He was only 23 when he killed himself.It was extremely rare anomaly - the second person was located at the back.It is not known why, but the second person to express emotions directly opposite to those experienced by Edward at the moment.So when he cried, the second face was smiling, and vice versa.In all this there was something demonic.The most sad is that Edward is clearly suffering from a mental disorder, he argued that the second head whispers terrible things.The reason for the suicide was Edward desire to get rid of the sinister whisper.In his suicide letter, he pleaded with the doctors to remove the second person.It is still unknown whether the request is made.The tragedy of Edward inspired many writers and directors, and it is dedicated to the song Thriller.
In the same time period fell another life conjoined twins - Pascal Pinon.He was more fortunate.While Edward Mordake suffered physical and mental illness, Pascal appeared in a freak show, and spent as much as 40 years.
children, known to the world thanks to its ugliness
First of all, the two-headed boy from Bengal, whose skull is kept in the Royal College of Surgeons of England.His life has documented and is the earliest confirmed the birth and life of this child.Preserved paintings depicting the boy.Both heads were the same size and have the proper brain.At the junction of the head grow normal hair.Properly functioning person, normally located.The second person is almost always kept a neutral expression.The child lived only 4 years - from 1783 to 1787. He died not of natural causes, and the accident - he was bitten by a cobra.
This is a rare malformation, and to date has only been documented 10 such cases.
In August 2008, Bangladesh was born two-headed baby - a boy whose parents have named Kiron.The news of this spread quickly throughout the country: these children are considered the embodiment of the living God.Mother with newborn had to hide from the crowd, so great was the desire of people to touch the deity.Everything comes considered it their duty to give something to the kid - a little bit of money or clothes.Kieron at birth weighed a little more than peers - more than 5 and a half kilograms.However, the development of its normal, nothing he does not get sick.
often do occur deformity development?
so often that the study of developmental abnormalities and congenital malformations allocated into a science - teratology.Statistical data in different countries are different because there are different scientific approaches.The International Classification of Diseases, Injuries and Causes of Death for deformations, and chromosomal abnormalities violations highlighted XVII class.According to various sources, the overall incidence of congenital malformations is 15%.
complexity of counting in the fact that a physical abnormality can be detected at any age, not necessarily at birth.The diagnosis of congenital malformations in the past 40 years has become more common than in all previous years.The reason is that the diagnosis has become more sophisticated, and those cases are detected that previously could not be found at all.That is not known whether the deformities was actually more or simply have learned to find.
The more people get sick?
people affect not only cancer, heart disease or seasonal flu.Change the background radiation, diet, industrial hazard leads to the fact that every week in the world there are nearly 5 new diseases.They describe them and try to somehow fight.In the world there are a variety of very rare diseases, the existence of which we have never heard.
Fortunately, among the rare hit smallpox, plague and cholera, or especially dangerous infections that can for a couple of days to destroy the population of entire cities.Curbing these diseases - human achievement.
It is often children progeria or pathological aging.The child begins to age after birth, and old age ends in death.Rare children suffering from this disease, live up to 10 years.There are also werewolf syndrome, or body hair of the whole body, eating inedible or allotrifagiya syndrome vampire and blue skin.These diseases are studied better than others.
