The Mystery of Cat Tongues

You have probably noticed that cat tongues are quite unique. They are rough and somehow scratchy. It seemed weird to American biologists and therefore they decided to look deeper into it.

If have you have already been licked by a cat, you definitely know that its tongue is different from that of a dog for example. Have you been thinking about its reason? American biologists have come up with a possible explanation. They have found out that cat tongue has a very specialised function.

Cats spend up to one third of their awake time taking care of their fur. That is why the surface of the cat tongue is adjusted to cleaning and combing the fur. The surface of the tongue consists of a lot of small backward-facing hooks that are called filiform papilae. They look similar as shark teeth and remind some kind of a velcro. They are firm because they contain keratin.

When the hook of the tongue gets to entangled fur, it gets stuck in it and helps to disentangle it. Unlike the combs, the hooks are mobile. When the cat does not use them, they lie on each other. They straighten up during licking and therefore can perfectly disentangle the fur and comb out loose hair and dirt from the fur.

The scientists created an enlarged model of the cat tongue and have found during its testing that not only can this structure perfectly disentangle the entangled fur but it is also easy to clean. They even got the technology simulating the cat tongue patented because they believe it could be useful in medicine or cosmetics.

But there is another benefit of this structure of the tongue. It helps cats with drinking. The hooks enlarge the surface of the tongue so the cat can catch more water in it (the cat do not create a cup from their tongue while drinking like dogs do). It also serves as a kind of scraper to get meat from bones (after all, cats are still carnivores). The way the hooks are turned toward the rear (deep into the mouth) also helps to move the food in the right way. But it also moves the loose hair into the throat and when you do not comb your cat enough, there can be flocks in its stomach. These can be dangerous if it fails to vomit them.

So what do you think, it is not such a big surprise as a function of the cat tongue, right? :-)