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The human nose is the first organ of the respiratory system. It is also the principal organ in the olfactory system. The shape of the nose is determined by the nasal bones and the nasal cartilages, including the nasal septum, which separates the nostrils and divides the nasal cavity into two.
In humans, the nose is located centrally on the face and serves as an alternative respiratory passage especially during suckling for infants. [1] [2] [3] The protruding nose that is completely separate from the mouth part is a characteristic found only in therian mammals.
Nasal hair or nose hair is the hair in the human nose. Adult humans have hair in the nostrils. Nasal hair functions include filtering foreign particles from entering the nasal cavity, and collecting moisture. [1]
The nasal bones are two small oblong bones, varying in size and form in different individuals; they are placed side by side at the middle and upper part of the face and by their junction, form the bridge of the upper one third of the nose . Each has two surfaces and four borders.
An aquiline nose (also called a Roman nose) is a human nose with a prominent bridge, giving it the appearance of being curved or slightly bent. The word aquiline comes from the Latin word aquilinus ("eagle-like"), an allusion to the curved beak of an eagle.
Myiasis. Myiasis ( / maɪ.ˈaɪ.ə.səs / my-EYE-ə-səss [1] ), also known as flystrike or fly strike, is the parasitic infestation of the body of a live animal by fly larvae ( maggots) that grow inside the host while feeding on its tissue. Although flies are most commonly attracted to open wounds and urine - or feces -soaked fur, some species ...
Like other tetrapods, humans have two external nostrils (anterior nares) and two additional nostrils at the back of the nasal cavity, inside the head (posterior nares, posterior nasal apertures or choanae ). They also connect the nose to the throat (the nasopharynx), aiding in respiration.
The nasal cycle is the unconscious [1] [2] alternating partial congestion and decongestion of the nasal cavities in humans and other animals. This results in greater airflow through one nostril with periodic alternation between the nostrils.
Obligate nasal breathing. Obligate nasal breathing describes a physiological instinct to breathe through the nose (or other forms of external nasal passages, depending on the species) as opposed to breathing through the mouth .
Nasal congestion is the partial or complete blockage of nasal passages, leading to impaired nasal breathing, usually due to membranes lining the nose becoming swollen from inflammation of blood vessels.