17 Body Parts You Didn't Know Had A Name

16. Philtrum

You might actually know this one, but in case you missed that particular BT advert in 2002, we call the little groove under your nose, your philtrum.

In mammals such as dogs, the philtrum helps keep the nose wet which, in case you'd ever wondered, is partially what gives dogs their amazing sense of smell.

In humans, it doesn't appear to serve a biological purpose, but a change in its appearance can actually be used to diagnose some diseases. A flattened philtrum is a symptom of fetal alcohol syndrome and Prader–Willi syndrome. A broader-than-average philtrum is sometimes associated with autism in boys.

15. Naris

Staying in the nasal region for the moment, each of your nostrils is actually called a naris, with the plural "nares".

The fleshy barrier between the two - the bit all the cool kids are getting pierced these days, is called your septum, and the tiny sliver of skin between your nostrils at the end of it is called your columella nasi.

Right, we're all thoroughly caught up on the anatomy of the nose now.