A snout is the protruding portion of an animal's face, consisting of its nose, mouth, and jaw.
[2] The muzzle begins at the stop, just below the eyes, and includes the dog's nose and mouth.
The loose flaps of skin on the sides of the upper muzzle that hang to different lengths over the mouth are 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.
Some breeds, such as many sled dogs and spitz types, have muzzles that somewhat resemble the original wolf's in size and shape, and others in the less extreme range have shortened it somewhat (mesocephalic) as in many hounds.