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更新日期：2019-05-08
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Piggy a subspecies of the wild boar domesticated by man about 7 thousand years ago and common mainly in the West. Feral pigs are found in North America in Australia and in New Zealand. Body length is from 0.9 to 1.8 m an adult individual weighs 50 to 150 kg. Compared with other cloven-hoofed animals which are more often herbivorous domestic pig is omnivorous like its ancestor the wild boar.
We cultivated breeds have survived some biological features inherent to wild pigs poor eyesight acute hearing, sense of smell the ability to swim well increased fertility ability to rapid growth and fat deposition. In pigs snout elongated with a short mobile proboscis ending naked flat snout which makes it possible to dig the earth in search of the roots of plants worms and other food. 44 teeth including 4 highly developed canines. Chetyrohpalye limbs. The udder teats has 10-16 arranged in two rows. The coat is rare, coarse, primarily of bristles but grown and pigs with copious scalp for example Hungarian mangalica. The stomach is a simple single chamber. Pets are omnivorous feeding on plant and animal food.
According to some anatomical and physiological parameters of pigs are very similar to man for this reason they are used for medical and research purposes.
Pigs have both apocrine and merokrinovye gland although the location of the last limited snout and nasal cavity. However, pig hairless as other mammals not used to cool the sweat gland. In comparison with other porcine mammals heat transfer through the mucous membranes by the respiratory appreciably less frequent. By increasing the external temperature pigs shed the excess heat by bathing in the mud although such bathing serves other purposes such as protection from the sun getting rid of pests and pomechanie area.
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