Quick watch! Pathogeneous principle (1) – Anti-China Animal Husbandry Website – A useful animal husbandry website
As the weather is getting cold, the temperature begins to decline, the farm begins to take insulation measures, thereby reducing the ventilation of the chicken house, so the respiratory disease will become a headache for farmers in the past.
There is currently a stubborn respiratory disease, repeated drug control can’t be died, but the mortality rises, decline in food, gradually mixed, and severe bronchitis, pneumonia, airbagitis, severely plagued clinical Veterinary worker. A lot of 16-18 age broilers have to “buckle”, 35-40 days of broilers have to come out in advance, and some chicken farms have a cost of 3 yuan / only, bringing great economy to the farming industry. loss.
Chicken breathing system anatomical structure and function
To thoroughly cure the respiratory disease, you must first understand the anatomical structure and function of the respiratory tract.
Chicken’s respiratory tract includes: nasal cavity, grouper, laryngeal, trachea, lungs and airbags.
Look at the map, meet the organs, at a glance! First, the nasal cavity: the nasal cavity is relatively long, and most of the nasal septum consists of cartilage. There are three nasal walls on each side of the nasal wall. The front nose is a slightly bending thin plate, opposite the nostrils, the nasal noodles are relatively large, and the rear nose is circular or triangular vest, the inner cavity is opened in the lower sinus; the mucous membrane has a sniffing nerve distribution.
Second, glowing cavity: It is a poultry, because there is no soft palate, the oral cavity has no obvious boundary, and it is often called a grouper. The oral top wall is cleft palate (or nasal hole fracture), and the front narrow back is wide. When breathing, the tongue is close to the top of the mouth, close the narrow portion, retain the wide portion to communicate nasal cavity and throat; when swallowing, the cleft palate is actively closed.
Third, the throat: relative to the nasal holes, the throat is longitudinal crack, which is covered with mucous membranes, and the pouredal silent belt.
The longer is more coarse, accompanied by the esophagus under subcutaneous, and is divided into two bronchiors above the heart base, and the bifurcation is formed to form a tube (a vaginal organ). There are a lot of tracheal rings (such as 100 to 130 chickens), and bird gas tubes are refined by evaporating heat to regulate body temperature. Therefore, the temperature is hot and the chicken will take a breathing and accelerate the frequency of breathing.
The lungs of poultry are not large, fresh red, the gas exchange area formed by the pulmonary capillaries, if the weight is calculated by the weight, it is 10 times more than the mammal, the blood supply is also rich.
It is a unique organ, which has multiple functions such as reducing weight, adjusting the center of gravity, adjusting body temperature, resonance; the airbag has 6 pairs in the embryo, but there is a part of the airbag to merge, most of the poultry is only 9 airbags. The airbag is non-real capsule, which is a thin fiber-elastic connective tissue film. Most of the inner surface is contracted in a single layer flat upper skin, and is a mild film. There is very little blood supply in the airbag wall, so there is no gas exchange. Instead, the surrounding tissue and bone cavity form a diverticulum for storage of air. The neck balloon, the kernel airbag (not paired) and the front chest airbag are also communicating with the intraperitoneal secondary bronchial; the rear pleural air bag is connected to the abdominal side secondary broncho; the abdominal airbag is maximized, and the end of the lungs is connected directly. They form a special gas circulation channel. When inhale, the fresh air is partially entered into the pulmonary capillary, most (about 3/4) enters the chest airbag and the ventum bag, and the air exchanged air is entered into the neck blanket. Claust airbag, chest airbag. When exhaling, the neck balloon, clavicle airbag, the gas of the front pleural airbag is discharged from the trachea, the fresh air in the backrest airbag, the fresh air in the airbag is sent to the pulmonary capillary. Therefore, gas exchange can be carried out regardless of inhalation or exhalation, gas exchange can be carried out to adapt to the strong metabolism of the poultry.
Original article, author：xinran，If reprinted，Please indicate the source：http://www.badpet.org/quick-watch-pathogeneous-principle-1-anti-china-animal-husbandry-website-a-useful-animal-husbandry-website/