Information about Nose
For the article about nose in humans, see .
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Human nose in profile
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Human nose from front
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Elephants have prehensile noses
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Dogs have very sensitive noses
In most humans, it also houses the nosehairs, which catch airborne particles and prevent them from reaching the lungs. Within and behind the nose is the olfactory mucosa and the sinuses. Behind the nasal cavity, air next passes through the pharynx, shared with the digestive system, and then into the rest of the respiratory system. In humans, the nose is located centrally on the face;on most other mammals, it is on the upper tip of the snout.
As an interface between the body and the external world, the nose and associated structures frequently perform additional functions concerned with conditioning entering air (for instance, by warming and/or humidifying it, also for flicking if moving and by mostly reclaiming moisture from the air before it is exhaled (as occurs most efficiently in camels).
In most mammals, the nose is the primary organ for smelling. As the animal sniffs, the air flows through the nose and over structures called turbinates in the nasal cavity. The turbulence caused by this disruption slows the air and directs it toward the olfactory epithelium. At the surface of the olfactory epithelium, odor molecules carried by the air contact olfactory receptor neurons which transduce the features of the molecule into non painful electrical impulses in the brain.
In cetaceans, the nose has been reduced to the nostrils, which have migrated to the top of the head, producing a more streamlined body shape and the ability to breathe while mostly submerged. Conversely, the elephant's nose has become elaborated into a long, muscular, manipulative organ called the trunk.
See also
Vertebrata
Cuvier, 1812
Classes and Clades
See below
Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns.
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Cuvier, 1812
Classes and Clades
See below
Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns.
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nostril (or naris, pl. nares) is one of the two channels of the nose, from the point where they bifurcate to the external opening. In birds and mammals, they contain branched bones or cartilages called turbinates, whose function is to warm air on inhalation and
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In animal physiology, respiration is the transport of oxygen from the ambient air to the tissue cells and the transport of carbon dioxide in the opposite direction. This is in contrast to the biochemical definition of respiration, which refers to cellular respiration
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mouth, also known as the buccal cavity or the oral cavity, is the orifice through which an organism takes in food and water.
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Location
In all mammals, the mouth is forward-facing in the face. Non-mammals have mouths in other locations (e.g...... Click the link for more information.
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The olfactory mucosa is an organ made up of the olfactory epithelium and the mucosa, or mucus secreting glands, behind the epithelium. The mucus protects the olfactory epithelium and allows odors to dissolve so that they can be detected by olfactory receptor neurons.
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Sinus may refer to:
In anatomy, where a sinus is a sac or cavity in any organ or tissue:
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In anatomy, where a sinus is a sac or cavity in any organ or tissue:
- Paranasal sinus, an air cavity in the cranial bones, especially those near the nose
- Sinus (anatomy), description of the general term
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The nasal cavity (or nasal fossa) is a large air-filled space above and behind the nose in the middle of the face.
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Function
The nasal cavity conditions the air to be received by the areas of the respiratory tract...... Click the link for more information.
The pharynx (plural: pharynges) is the part of the neck and throat situated immediately posterior to the mouth and nasal cavity, and cranial, or superior, to the esophagus, larynx, and trachea.
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respiratory system generally includes tubes, such as the bronchi, used to carry air to the lungs, where gas exchange takes place. A diaphragm pulls air in and pushes it out. Respiratory systems of various types are found in a wide variety of organisms.
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Mammalia
Linnaeus, 1758
Subclasses & Infraclasses
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Linnaeus, 1758
Subclasses & Infraclasses
- Subclass †Allotheria*
- Subclass Prototheria
- Subclass Theria
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Camelus
Linnaeus, 1758
Species
Camelus bactrianus
Camelus dromedarius
Camelus gigas (fossil)
Camelus hesternus (fossil)
Camelus sivalensis (fossil)
Camels
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Linnaeus, 1758
Species
Camelus bactrianus
Camelus dromedarius
Camelus gigas (fossil)
Camelus hesternus (fossil)
Camelus sivalensis (fossil)
Camels
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Olfaction (also known as olfactics) refers to the sense of smell. This sense is mediated by specialized sensory cells of the nasal cavity of vertbrates, and, by analogy, sensory cells of the antennae of invertebrates.
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In anatomy, a turbinate (or nasal concha) is a long, narrow and curled bone shelf (shaped like an elongated sea-shell) which protrudes into the breathing passage of the nose.
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The nasal cavity (or nasal fossa) is a large air-filled space above and behind the nose in the middle of the face.
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Function
The nasal cavity conditions the air to be received by the areas of the respiratory tract...... Click the link for more information.
The olfactory epithelium is a specialized epithelial tissue inside the nasal cavity that is involved in smell. In humans, it measures about 1 inch wide by 2 inches long (about 2 cm by 5 cm) and lies on the roof of the nasal cavity about 3 inches (about 7 cm) above and behind the
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odor or odour (see spelling differences) is a volatilized chemical compound, generally at a very low concentration, which humans and other animals perceive by the sense of olfaction. Odors are also called smells, which can refer to both pleasant and unpleasant odors.
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Location olfactory epithelium in the nose
Function Detect traces of chemicals in inhaled air (sense of smell)
Neurotransmitter Glutamate
Morphology Bipolar sensory receptor
Presynaptic connections None
Postsynaptic connections
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Function Detect traces of chemicals in inhaled air (sense of smell)
Neurotransmitter Glutamate
Morphology Bipolar sensory receptor
Presynaptic connections None
Postsynaptic connections
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In animals, the brain or encephalon (Greek for "in the skull"), is the control center of the central nervous system, responsible for behavior. The brain is located in the head, protected by the skull and close to the primary sensory apparatus of vision, hearing,
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Cetacea
Brisson, 1762
Diversity
Around 88 species; see list of cetaceans or below.
Suborders
Mysticeti
Odontoceti
Archaeoceti (extinct)
(see text for families)
The order Cetacea
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Brisson, 1762
Diversity
Around 88 species; see list of cetaceans or below.
Suborders
Mysticeti
Odontoceti
Archaeoceti (extinct)
(see text for families)
The order Cetacea
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Elephantidae
Gray, 1821
Subfamilia
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Gray, 1821
Subfamilia
- See Classification
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The factual accuracy of part of this article is disputed.
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The dispute is about Nasology, which has been described as "an extended joke at the expense of Phrenology"''.
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The Nasal Bridge is the name given to the upper, bony part of the nose, overlying the nasal bones. A lower or higher than average nasal bridge can be a sign of various genetic disorders, such as fetal alcohol syndrome.
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Nose-picking, or rhinotillexis (Greek, rhino "nose" + tillexis "habit of picking"), is the act of extracting mucus and/or foreign bodies from the nose with a finger or other object.
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