How do we suck?

Question

I know it sounds a bit of a wierd question, but i was thinking just now, how do we generate the suction in our mouths?

Answer 1

Now for the real answer. Suction is caused when you create a low pressure region. To do this with your mouth, you can lower your jaw while holding your cheeks from pulling in. When you do that you are increasing the volume inside your mouth. If you keep your mouth closed while you do this, you do not let additional air in to fill the volume. This means you have the same amount (mass) of air but in a larger volume, therefore it must be at a lower pressure. This is just the opposite effect of compressing air to a smaller volume to raise pressure. Because your mouth is at lower pressure than the outside, stuff like liquid in a straw will tend to flow in to equalize the pressure.

Breathing is achieved the same way with the downward motion of the diaphragm expanding the volume of the lungs to create the suction that draws air in. When the diaphragm moves back up, the volume decreases, increasing pressure and causing us to exhale.

One interesting experiment is to show that we cannot generate very much suction. Put a glass of water on the floor and use a piece of tubing as a straw to try and drink out of it while standind. You will likely find it impossible. For each 1 fot change in elevation, you need to provide 0.43 psi. Even generating 1 psi is pretty tough.

Answer 2

when you create a space in your mouth without air it creates a vacuum. You lower the jaw and raise the palate and move other muscles to create a space. If your mouth is open you can't do it without inhaling. but if your mouth is closed you can use the jaw and so forth.

Answer 3

We create a vacuum in our mouths.
That is the reason you can't suck and blow at the same time.
A well known physical impossibility,so there!

Answer 4

By putting your tongue on the roof of your mouth then bringing it down, creating a vacuum into which liquid wants to flow.

Answer 5

By creating a vacuum in your mouth.

Answer 6

It's innate. Like breathing. Or smiling. It just comes naturally. A gfit from God.

Answer 7

Its an innate function that you are born with. We root for the Mothers Breast when we are born.

Answer 8

dont know but I like the way my girl does it

Answer 9

vacuum

Answer 10

sucking starts from when we are in our mothers womb.