nose (nōz) the specialized facial structure serving as an organ of the sense of smell and as part of the respiratory apparatus.
nose
nose [nōz]
saddle nose , swayback nose a nose with a sunken bridge.
nose (n z)n. The part of the human face or the forward part of the head of other vertebrates that contains the nostrils and organs of smell and forms the beginning of the respiratory tract. |
nose
Etymology: AS, nosu
the structure that protrudes from the anterior part of the face and serves as a passageway for air to and from the lungs. The nose filters the air, warming, moistening, and chemically examining it for impurities that might irritate the mucous lining of the respiratory tract. The nose also contains receptor cells for smell, and it aids the faculty of speech. It consists of an internal and an external part. The external part, which protrudes from the face, is considerably smaller than the internal part, which lies over the roof of the mouth. The hollow interior part is separated into a right and a left cavity by a septum. Each cavity is divided into the superior, middle, and inferior meati by the projection of nasal conchae. The external part of the nose is perforated by two nostrils (anterior nares), and the internal part by two posterior nares. The pairs of sinuses that drain into the nose are the frontal, maxillary, ethmoidal, and sphenoidal sinuses. Ciliated mucous membrane lines the nose, closely adhering to the periosteum. The mucous membrane is continuous with the skin through the nares and with the mucous membrane of the nasal part of the pharynx through the choanae. The mucous membrane contains the olfactory cells that form the olfactory nerve that enters the cranium.
Nose
Anatomy The double-barrelled structure at the center of the face, which is a conduit of air
Drug slang A regionally popular street term for cocaine
Vox populi A popular term for a distinct talent for detecting something
Drug slang A regionally popular street term for cocaine
Vox populi A popular term for a distinct talent for detecting something
nose [nōz]
the specialized structure of the face that serves both as the organ of smell and as a means of bringing air into the lungs. (See also Plates.) Air breathed in through the nose is warmed, filtered, and humidified; that breathed through the mouth is not.
The nostrils, which form the external entrance of the nose, lead into the two nasal cavities, which are separated from each other by the nasal septum, a partition formed of cartilage and bone. Three bony ridges project from the outer wall of each nasal cavity and partially divide the cavity into three air passages. At the back of the nose these passages lead into the pharynx. The passages also are connected by openings with the paranasal sinuses. One of the functions of the nose is to drain fluids discharged from the sinuses. The nasal cavities also have a connection with the ears by the eustachian tubes, and with the region of the eyes by the nasolacrimal ducts.
The interior of the nose is lined with mucous membrane, and most of the membrane is covered with minute hairlike projections called cilia. Moving in waves these cilia sweep out from the nasal passages the nasal mucus, which may contain pollen, dust, and bacteria from the air. The mucous membrane also acts to warm and moisten the inhaled air.
High in the interior of each nasal cavity is a small area of mucous membrane that is not covered with cilia. In this pea-sized area are located the endings of the nerves of smell, the olfactory receptors. These receptors sort out odors. Unlike the taste buds of the tongue, which distinguish between only four different tastes (salt, sweet, sour, and bitter), the olfactory receptors can detect innumerable different odors. This ability to smell contributes greatly to what we usually think of as taste, because much of what we consider flavor is really odor. (See also smell.)
The nostrils, which form the external entrance of the nose, lead into the two nasal cavities, which are separated from each other by the nasal septum, a partition formed of cartilage and bone. Three bony ridges project from the outer wall of each nasal cavity and partially divide the cavity into three air passages. At the back of the nose these passages lead into the pharynx. The passages also are connected by openings with the paranasal sinuses. One of the functions of the nose is to drain fluids discharged from the sinuses. The nasal cavities also have a connection with the ears by the eustachian tubes, and with the region of the eyes by the nasolacrimal ducts.
The interior of the nose is lined with mucous membrane, and most of the membrane is covered with minute hairlike projections called cilia. Moving in waves these cilia sweep out from the nasal passages the nasal mucus, which may contain pollen, dust, and bacteria from the air. The mucous membrane also acts to warm and moisten the inhaled air.
High in the interior of each nasal cavity is a small area of mucous membrane that is not covered with cilia. In this pea-sized area are located the endings of the nerves of smell, the olfactory receptors. These receptors sort out odors. Unlike the taste buds of the tongue, which distinguish between only four different tastes (salt, sweet, sour, and bitter), the olfactory receptors can detect innumerable different odors. This ability to smell contributes greatly to what we usually think of as taste, because much of what we consider flavor is really odor. (See also smell.)
Disorders of the Nose. The mucous membrane of the nose is subject to inflammation; any such inflammation is called rhinitis, which may be caused by the common cold, or by an allergy, particularly hay fever. Nasal polyps may obstruct the nasal passages. Epistaxis, or nosebleed, may be caused by an injury to the nose or may be a symptom of other diseases. The nasal septum may grow irregularly or be deflected to one side by injury; this condition is called deviated septum.
Surgery of the Nose. Nasal surgery is indicated in disorders of the nasal septum, polyps and other growths, and traumatic injury to the structures that interfere with normal nasal breathing. Cosmetic plastic surgery is also done to correct disfigurement that is disturbing to the patient.
Patient Care. Prior to surgery the patient is instructed in the kind of surgery anticipated and is informed of the immediate aftereffects of swelling and discoloration. He is told that the residual swelling may last for several weeks and success of the operation cannot be assessed until after that time.
Immediately after surgery the greatest danger is hemorrhage. If the patient swallows repeatedly or spits up blood, excessive bleeding should be suspected. A Teflon splint or intranasal packing often is used to support the nasal structures and prevent the formation of hematoma, another complication that may develop.
Ice compresses are applied for 24 hours after surgery to reduce swelling and minimize bleeding. The patient is placed in semi-Fowler position during this time.
During convalescence the patient should avoid blowing his nose and picking at crusts. A lubricant may be used to soften the crusts, but no swabs or other objects should be used to clean the nose. A humidifier in the room may help reduce drying and irritation of the mucous membranes during healing.
Immediately after surgery the greatest danger is hemorrhage. If the patient swallows repeatedly or spits up blood, excessive bleeding should be suspected. A Teflon splint or intranasal packing often is used to support the nasal structures and prevent the formation of hematoma, another complication that may develop.
Ice compresses are applied for 24 hours after surgery to reduce swelling and minimize bleeding. The patient is placed in semi-Fowler position during this time.
During convalescence the patient should avoid blowing his nose and picking at crusts. A lubricant may be used to soften the crusts, but no swabs or other objects should be used to clean the nose. A humidifier in the room may help reduce drying and irritation of the mucous membranes during healing.
Nose and related structures.
artificial nose
1. a device placed between the endotracheal tube and the breathing apparatus to trap the heat and humidity in the exhaled gas and use it to warm and humidify subsequently inhaled gas.
2. an electronic system used to monitor and classify odors and gases, consisting of a sensor and a pattern recognition system; called also electric nose.
nose,
n an organ of the body that extends from the end of the palate to the face. Olfactory cells within the nose are responsible for detecting molecules and sending the sensory impulses along the olfactory nerve to the brain.
nose,
n the structure that protrudes from the anterior portion of the midface and serves as a passageway for air to and from the lungs. The nose filters, warms, and moistens the air on its passage into the lungs. The nose contains the end organs of smell.
nose, bones of,
n paired facial bones that together shape the nasal bridge, the edges of which join with the frontal bone at the top and the upper cheek bones at the sides.
nose
the specialized structure of the head that serves both as the organ of smell and as the first segment of the respiratory apparatus. Air breathed in through the nose is warmed, humidified and filtered by the richly vascular mucous membrane. On breathing out through the nose some of the heat gained is returned to the nasal mucous membrane. See also nasal.
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Anatomic structures of the canine nose. By permission from Aspinall V, O'Reilly M, Introduction to Veterinary Anatomy and Physiology, Butterworth Heinemann, 2004
nose bleed
see epistaxis.
butterfly nose
in dogs, a partially unpigmented nose.
collie nose
see solar dermatitis.
Dudley nose
see nasal depigmentation.
nose lead, nose tong, nose grip, bulldog
a scissor-like instrument with the blades curved towards each other and fitted with a knob on each of their ends. The tool is inserted into the nostrils with the blades opened, positioned on either side of the septum, then closed tight. The end of the nasal septum is grasped between the ends of the tongs. Provides fair restraint for a cow having a minor interference, such as an intravenous injection. Comparable in effect to a twitch on a horse.
nose mite
Speleognathus australis; occurs in wild ruminants and may cause bouts of sneezing. See also nasal acariasis.
parasympathetic nose
unilateral or bilateral dryness, hyperkeratosis and sometimes loss of pigmentation of the nasal planum in dogs. There may be fissuring and ulceration of the nares and nasal philtrum. These are the result of damage, either inflammatory or neurogenic, to the glands responsible for lubricating the nasal planum and nasal vestibule.
nose picking
a vice in quail kept in overcrowded conditions. The birds pick at the soft tissue where the beak and skin join. Causes blood loss and subsequent beak deformity.
pinched nose
see stenotic nares.
nose printing
epidermal contours in the skin of the nose of dogs and the muzzle of ruminants are reflections of dermal structures; they are individually distinctive and can be replicated by applying ink to the part with an inking pad and imprinting on paper; provide a means of identification similar to fingerprints in humans. See also transponder, nasal areae.
snow nose
see nasal depigmentation.
wry nose
see nasal deviation.
nose
Anatomy The double-barrelled structure at the center of the face, which is a conduit of air for non-mouth breathers, and a support for eyeglasses. See Cocaine nose, Internal nose, Potato nose, Rabbit nose, Saddle nose, Sculptured nose, Stinky nose, Tapir nose, WC Fields nose Drug slang A regionally popular street term for cocaine.
Patient discussion about nose.
Q. I got runny nose every morning and in the evening. Never had this problem before. Worst still is gardening. Why why why?
A. I have Janet Craig, and Corn plan Draceanas, Spider Plants, Chinese Evergreen, Weeping Fig, Pothos,and Peace Lilly; plus others. The largest are the Draceanas and those named are supposed to be among the best at cleaning toxins from the air. They Rubber Plants are a good choice but I'm running out of room! Jade may want some company!
Q. sinus infection and Polups and I can't breath through my nose. What can I do?
A. You could also try to rub a little bit of vicks on your chest, throat, and a very small amount on you upper lip.
Q. Common cold but dreadful. I am suffering from a dreadful common cold. As I write: believe me, I long to have done with it. I am not enjoying it in the least. I fear however that I am already too old to see the day when the common cold becomes history. I tried the simple first aid tablets but no use. Could you use this session to help me out?
A. chicken soup :) the best cure!
you can try fresh ginger tea - it really make it easier..opens up the sinuses, drys up the mucous.
Read more or ask a question about noseyou can try fresh ginger tea - it really make it easier..opens up the sinuses, drys up the mucous.
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