Snout

Asnoutis the protruding portion of an animal's face, consisting of its nose, mouth, and jaw. In many animals, the structure is called amuzzle,^[1]rostrum,orproboscis.The wet furless surface around the nostrils of the nose of manymammalsis called therhinarium(colloquially this is the "cold wet snout" of some mammals). The rhinarium is often associated with a stronger sense ofolfaction.

Variation

Asian elephant(Elephas maximus indicus).The extendedproboscisis called the "trunk" and is used for a wide range of purposes, includingeating,drinking,exploration,andsocial grooming.

Snouts are found on many mammals in a variety of shapes. Some animals, including ursines and great cats, have box-like snouts, while others, like shrews, have pointed snouts.Pigsnouts are flat and cylindrical.

Primates

Strepsirrhineprimates have muzzles, as dobaboons.Great apeshave reduced muzzles, with the exception being human beings, whosefacedoes not have protruding jaws nor a snout but merely ahuman nose.^[2]

Dogs

The muzzle begins at thestop,just below the eyes, and includes the dog's nose and mouth. In the domestic dog, most of the upper muzzle contains organs for detectingscents.The loose flaps of skin on the sides of the upper muzzle that hang to different lengths over themouthare called 'flews'.

The muzzle is innervated by one of the twelve pairs of cranial nerves, which start in the brain and emerge through the skull to their target organs. Other destinations of these nerves are the eyeballs, teeth and tongue.

The muzzle shape of adomestic dogranges in shape depending upon thebreed,from extremely long and thin (dolichocephalic), as in theRough Collie,to nearly nonexistent because it is so flat (extremebrachycephalic), as in thepug.Some breeds, such as manysled dogsandspitztypes, have muzzles that somewhat resemble the originalwolf's in size and shape, and others in the less extreme range have shortened it somewhat (mesocephalic) as in many hounds.

Dolichocephalic(long and thin snout):Rough Collie
Mesocephalic(medium length snout):English Cocker Spaniel
Brachycephalic(extremely flat snout):Pug
The flews of theBlack and Tan Coonhoundoverhang the lower jaw.

References

^Howard E. Evans; Alexander de Lahunta (7 August 2013).Miller's Anatomy of the Dog - E-Book.Elsevier Health Sciences.ISBN 978-0-323-26623-9.
^Wilkins, Adam (2017). "History of the Face II: From Early Primates to Modern Humans".Making Faces.Cambridge, Massachusetts: The Belknap Press. p. 196.ISBN 9780674725522.

External links

The dictionary definition ofsnoutat Wiktionary

[EvansLahunta2013-1] Howard E. Evans; Alexander de Lahunta (7 August 2013).Miller's Anatomy of the Dog - E-Book.Elsevier Health Sciences.ISBN 978-0-323-26623-9.

[2] Wilkins, Adam (2017). "History of the Face II: From Early Primates to Modern Humans".Making Faces.Cambridge, Massachusetts: The Belknap Press. p. 196.ISBN 9780674725522.

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