From the brains behind brains on, this is the moment of um.

Um, um, um, um, um, um, um, um, moment of um comes to you from APM studios. I'm Mark Sanchez.

Um.

When I was a kid, I had a few unsavory habits, like most kids do.

I wasn't so much a nail biter orer, or a litterer, or even a nosed picker, but I did love to spit.

I would have competitions with the neighbor kids to see who could spit farther.

Looking back on it, it's kind of gross.

But it was cool back then.

But now, it's got me thinking,

why did I want to waste my saliva? It's good for our body to have saliva, right? Our friend

Luke had a similar question about this. Hello, my name is Luke. And my question is how and why do we produce saliva?

Hi there.

My name is Laura Orvidis.

I am a pediatric otolaryngologist at the Mayo Clinic, and that means a ear, nose, and throat

doctor.

Well, saliva is mostly water, but it also contains some minerals and proteins.

You have six major saliva glands and hundreds of minor salivary glands.

Six major ones is you have two in your cheeks called the parotid glands.

You have two under your chin called the sub-mandibular glands.

And you have two on the floor of your mouth called the sublingual glands.

Those are the major glands, and then you have little tiny ones all over.

We produce saliva through the ducks, and you need saliva for a couple of things. One, it keeps your mouth moist and makes it feel better. It helps you chew, taste, and swallow. You need the saliva

...