Which term refers to the projecting part of the face that includes the nose and mouth of an animal?

The term that refers to the projecting part of the face that includes the nose and mouth of an animal is "muzzle." The muzzle encompasses the whole structure of the upper and lower jaws and the nose, making it a broader term that incorporates the entirety of this facial area. This is particularly relevant in veterinary practice, as understanding anatomical terminology is crucial for effective communication and treatment.

While "snout" is often used specifically for the elongated nose of some animals, such as pigs, it does not encompass the mouth area as completely as "muzzle" does. The term "fang" refers specifically to the long, pointed teeth typically seen in certain carnivorous animals, and "jaw" pertains more to the structure that holds the teeth rather than the external projection that includes the nose. Hence, "muzzle" is the most accurate term in a general context for describing the external facial structure comprising the nose and mouth.