Animal noses have different structures and functions. The elephant's long nose is tough and can stretch at will, so it can do all kinds of things very skillfully, such as drawing water, pulling weeds and even carrying wood. Buffalo's nose will ooze sweat drops in hot days, which can regulate the temperature by emitting heat. Snail's nose can emit sound waves over 20000 Hz, just like radar.

The nose is an olfactory organ. Different animals have great differences in the sensitivity of smell. Fish's nose is two concave holes, and olfactory cells are mainly concentrated in the nasal cavity. Fish mainly rely on their sense of smell to find food in the dark. Sharks have an extremely sensitive sense of smell. They can smell blood several kilometers away and immediately rush to the place where there is blood. Dogs have a particularly sensitive sense of smell, and can distinguish the smells of more than 1000 different substances. Police dogs track criminals with very sensitive noses.