1. It takes many muscles to pucker up.
To pucker up for a kiss - or to play that trumpet - you have to contract your orbicularis oris. Scientists used to think the orbicularis oris was a single sphincter muscle inside the lips. But now we know it's actually a complex of four muscles.
2. Lips don't sweat.
No wonder--lips simply don't have sweat glands. Since sweat glands also help keep the skin moisturised, that means lips tend to dry out faster than other parts of the body.
3. Lips don't sweat.
No wonder--lips simply don't have sweat glands. Since sweat glands also help keep the skin moisturised, that means lips tend to dry out faster than other parts of the body.
People suffering from a form of facial paralysis known as Bell’s palsy can have trouble smiling or frowning. The condition is caused by damage to the facial nerves. Fortunately, people with Bell’s palsy generally recover with time.
5. Your lips are unique.
Many animal species have lips, of course. But only human lips have such a distinct border between the pinkish, reddish parts and the surrounding skin, according to LiveScience. Scientists call this the “vermilion border.”
6. That fleshy bump in the middle of your upper lip has a name.
In fact, that fleshy bump has a few names, including procheilion, labial tubercle, or tuberculum labii superioris.
7. Blood gives your lips their reddish hue.
The skin of the lips is thinner than skin elsewhere on the body, consisting of three to five cellular layers instead of up to 16. Thinner skin means it's easier to see the blood vessels underneath. Of course, this effect is more pronounced in people with light-colored skin.
Sources: huffingtonpost.com
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