Chicken is the most common bird in the household. This is understandable: this nurse gives a person not only delicious meat, but also treats him with eggs. And in order to carry them down, this bird needs special organs and a different body structure from mammals. We offer to get acquainted with what is the chicken anatomy and learn a lot of new things from our interesting article.
It is worth starting with the fact that the chicken is a bird. Despite the doubts of some of her ability to fly, she ranked precisely in this class. The domestic chicken has a front pair of limbs that are adapted for flight, and also the rear ones - for strong standing on the ground.
In addition, the anatomy of the internal organs of this poultry is also different from the structure of mammals. So, their main feature: the presence of a special body - the egg deposit, with which the birds can produce their offspring in the light. What other features keeps the body of such a familiar bird, read on.
Conditionally divided into head section, torso and limbs. The head of the chicken looks very small compared to its body, and consists of a skull with a horny process - its beak. It is planted on a long neck, consisting of 13-14 vertebrae of the cervical region. The spine continues the thoracic region from 7-9 vertebrae, followed by the lumbosacral. The vertebrae in it are accreted, and not only among themselves, but also from the last pectoral and first caudal bone. The line 5-7 of the movable vertebrae of the caudal department completes, the last of which is called the tailbone - the tail feathers are attached to it.
The thoracic spine has such a special bone as the keel - the most voluminous muscles of the poultry chest are attached to it. It is well felt, and it is for her that farmers can determine the fatness of their birds.
It will be interesting to know that in birds, almost all bones are hollow - nature has taken care to lighten the skeleton of these creatures. That is why the total weight of chicken bones is only 10% of its total mass. The wings also help feathered furrows the celestial spaces and therefore are very mobile and consist of many bones. These are humerus, forearm, wrist bones, metacarpal bone and fingers.
The hind limbs are much longer than the fore and fastened almost at the back, almost half of their length is hidden under the plumage. They consist of tibia, tibia and fibula, femur and tarsus. The foot often consists of 4 fingers, but there are also rocks that have more or less. Roosters, in addition, have protruding growths on their legs — spurs.
The internal structure of birds suggests the same organs that mammals have: the esophagus, stomach, intestines, liver and heart, and special, inherent only to birds. So, for the processing of food, they needed a special organ of the digestive system - goiter. This is where the pre-wetting and food processing takes place. Then it enters the stomach, where gastric juice is secreted in its glandular section. Further in the intestines of the food are taken all the nutrients and it is displayed through the sphincter.
Interestingly, the intestines of chickens have a size of 160-170 cm, which is six times the length of their torso. But despite this, the process of digestion is very fast, because chickens are almost always in search of food. To grind their daily diet, birds specially swallow sand and small pebbles.
The selection system also has its own characteristics. Paired buds communicate with the cloaca, where uric acid is released, and the birds have no bladder. For the formation of eggs in chickens there is such a special organ as the egg-deposit. It departs from the ovary of the chicken, and then communicates with the cloaca. As a rule, egg formation in the oviduct takes place within 12-48 hours.Outline of the excretory system
Everyone knows the fact that when slaughtering a chicken, it can run without a head for some time. This is justified by the entry into the body, even after death, by nerve impulses.
This is a rooster that has gained unprecedented fame and even entered into the Guinness Book of Records. Surprisingly, this feathered man literally managed to lose his head and remain viable. At the same time, the bird has lived without it for 18 months. This story, which dates back to 1945, was officially documented by scientists at the University of Utah. Then they studied the ward from the farm Loyda Olsen.
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And all this happened. On September 10, 1945, Loyd's mother-in-law arrived at the Olsen couple's farm in Fruta. For this event, the wife asked to score the largest domestic chicken. However, the farmer took pity on his feathered ladies and chose a young rooster named Mike as a victim. But the case of the case or the quivering hand of the host allowed the ax to pass a little bit obliquely: the rooster had one ear left intact, as well as part of the brain stem.
The pet, which was almost served, suddenly jumped up, heading back to the chicken coop. He turned out to be quite viable, soon grew stronger, survived the winter and the next summer, and even tried to peck food along with all the other birds. It was decided to leave this miracle, and it was necessary to feed it manually, with a milky-water solution. It is believed that the pet was able to live in this condition for another eighteen months. And he died due to the fact that one day after the tour, the farmer did not have time to clear his throat in the middle of the night.
Scientists who examined the animal indicated that the rooster was able to stretch so long because the ax blade passed by the carotid artery. In addition, it was the remaining brain stem that was responsible for the vital functions of the body. Do you think that a cock that has lived for 18 months without a head is just a myth? Watch the video of the rooster, from the channel Bizarre World.
The headless chicken became literally the symbol of its homeland, the city of Fruta. Every year, on the third weekend of May, Mike's Day is held there. His program includes throwing eggs and many more fun games.
There is another experiment, which is well amenable to birds. It is believed that the chicken can be made to stand still for up to half an hour in one interesting way. To do this, put it on the floor, and then draw a strip, starting from its head. The bird freezes, concentrating on the line, and lies motionless until it is distracted or moved to another place. It is believed that this is due to catatonic syndrome, namely the stupor associated with fear.