What is the nostril?

in human beings, nostril, also called naris, whose plural is nanes, is a hole at both ends of the pair of channels leading from the outside of the nose to the head, where they connect to the airways leading to the pharynx and lungs. Each end of these channels, known as the nasal passages, has a few nostrils, so people actually have a total of four of these holes, two external and two inner. This anatomical arrangement is also duplicated in many types of animals.

Although it is often mistakenly believed that the nostril is a nose passage, it is incorrect. In fact, the nostrils are simply through the hole at both ends of the nasal cavity. They allow the air to move through the nasal cavity, in both directions, during breathing. Some fish may be present nostrils, but are part of the olfactory system only and are not used for breathing.

Two pairs of nasal fabrics are called rear and front nars. The front nares are external nose holes and are most often referred to as nostrils. RearNareres are the inner pair of holes leading from the back of the nasal cavity to the pharynx and then into the lungs.

nostrils, in addition to allowing air to enter the nasal cavity and finally into the lungs, also serve a different purpose. They allow air to pass through the olfactory sensors in the nasal cavity, which are the main part of the anatomy that creates the sense of smell. In some cases, the presence of nasal holes in pairs may allow the individual to determine the direction from which the fragrance emits, through differentiation of the relative intensity of the fragrance, as perceived in each nasal nasal substance.

Small hairs in the nasal cavity and rear nráS act as filters for small particles in the air and prevent the entry of foreign material into the lungs. Each rear nostril can have a apparently 1,000 of these hair. More of these nasal hair is distributed in the nasal cavity.