Scientists of many countries are engaged in deciphering pig and human DNA. The information about the results of research appearing in the media is staggering: these two species are very similar, of course, not externally, but by the internal structure of the organs. Attempts to transplant them. Many experiments and experiments on ethical standards are not subject to publicity. These sensations of the scientific world almost undermined the well-known theory of the origin of the human species from primates. Find out whether to rush to conclusions.
We're the same blood
Indeed, our closest "relatives" have always been called monkeys. Now science is trying to prove: the closest to us is the family of pigs. However, it does not follow from this that man is descended from a pig.
Each animal can claim this role. The coincidence in the cells of deoxyribonucleic acid - human DNA has almost all types of mammals. The differences from chimpanzees in the genes are 1-2%. How many matches with pigs - is still unknown. But it has already been proven that their blood almost completely coincides with human. Molecules of growth hormone are similar by 70%.
An elementary comparison of the guts of a person and a pig affects by weight: the human heart - 300 g, pork - 20 g more, the lungs respectively - 790 g and 800 g, the same close figures for the kidneys and liver.
Such an identical inner world
The similarity of a pig with a human body is revealed in:
- the structure of the jaw and teeth;
- morphology and physiology of the kidneys;
- visual acuity and eye structure;
- anatomical and physiological features of the cardiovascular and digestive systems.
Very close to a human pig skin, which also sunbathes in the sun.
Scientists have determined that not only the size of a pig's heart is close to a person. The blood flow is equally distributed along its arteries and, like most people, the right-sided blood supply dominates.
There are no fundamental differences in the enzymatic profile of the digestive tract.
In pigs and in humans, the form of the pancreas is the same, which allowed, along with a similar composition of blood, to produce pork insulin. Later came the human and semi-synthetic.
Human biological model
All the above facts do not prove that people come from pigs or vice versa. But today the pig because of the anatomical and physiological similarity with man is his most accurate biological model. However, the size of the home sow is not very suitable for experiments. Another thing - dwarf pigs, which is convenient to keep in laboratories and used for various manipulations.
For the first time they were brought out by American scientists in the middle of the 20th century. Then this idea was picked up by genetics from Germany, Japan, Russia.
Laboratory pigs have a high level of sensitivity to most drugs and chemicals. They have advantages over rodents - their response to drugs is almost similar to that of humans.
Surrogate mothers of human organs
Dwarf piglets are used not only in experiments to study diseases of the heart, blood vessels, stomach ulcers, alcoholism, obesity and other diseases.
Now unique experiments are being carried out on transplanting pig organs to seriously ill people. Scientists are trying to transplant the heart, liver, kidneys, skin. However, to overcome the problem of rejection until they can.
A lot of controversy in the scientific world is caused by attempts to grow human organs inside pigs. Stem cells from the human body are placed in the sow egg. It turns out a certain hybrid from which not an organism grows, but a separate organ, for example, a heart.
Many see this as inhumanity towards animals, the danger of transmitting diseases from pigs to people, violations of the genetic code.
Houses Ilya, and in people a pig
If the DNA and the structure of pig and human organs began to be compared in the 21st century, then the common features in the character and behavior began to be found long ago. "You act like a pig", "Dirty like a pig", are phrases often used in our society.
Close proximity to sows allowed to study their characteristics and habits. This is reflected in Russian folklore - proverbs and sayings. Sometimes you can find positive features in them, for example, "Be healthy like water, rich as earth, prolific as a pig."
But for the most part these are negative characteristics associated with stupidity, uncleanliness, ignorance, lack of culture. For example, "Put a pig at the table, she and her feet on the table", "Give the pig horns - she all butts."
Is it true that a pig loves dirt, find out by reading the article "Are Pigs Clean Animals".
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