Want to find out just how much you use your tongue? Try eating an ice-cream cone
or singing your favorite song without it. You need your tongue to chew, swallow, and
sing. And don't forget talking and tasting!
Has anyone ever told you that the tongue is a muscle? Well, that's only partly
true: The tongue is really made up of many groups of muscles. These muscles run in
different directions to carry out all the tongue's jobs.
The front part of the tongue is very flexible and can move around a lot, working
with the teeth to create different types of words. This part also helps you eat by
helping to move food around your mouth while you chew. Your tongue pushes the food
to your back teeth so the teeth can grind it up.
The muscles in the back of your tongue help you make certain sounds, like the letters
"k" and hard "g" (like in the word "go"). Try saying these letters slowly, and you'll
feel how the back of your tongue moves against the top of your mouth to create the
The back of your tongue is important for eating as well. Once the food is all ground
up and mixed with saliva (say: suh-LYE-vuh), or spit,
the back muscles start to work. They move and push a small bit of food along with
saliva into your esophagus (say: ih-SAH-fuh-gus), which is a food
pipe that leads from your throat to your stomach.
Tongue Held Down Tight
Have you ever wondered what keeps you from swallowing your tongue? Look in the
mirror at what's under your tongue and you'll see your frenulum (say:
FREN-yuh-lum). This is a membrane (a thin layer of tissue) that connects your tongue
to the bottom of your mouth. In fact, the whole base of your tongue is firmly anchored
to the bottom of your mouth, so you could never swallow your tongue even if you tried!
Don't put that mirror away yet! Look at your tongue again, but this time look closely
at the top of it. Notice how it's rough and bumpy — not like the underside,
which is very smooth. That's because the top of your tongue is covered with a layer
of bumps called papillae (say: puh-PILL-ee).
Papillae help grip food and move it around while you chew. And they contain your
taste buds, so you can taste
everything from apples to zucchini! People are born with about 10,000 taste buds.
But as a person ages, some of his or her taste buds die. (An old person may only have
5,000 taste buds!) That's why some foods may taste stronger to you than they do to
an adult. Taste buds can detect sweet, sour, bitter, and salty flavors.
So how do you know how something tastes? Each taste bud is made up of taste cells,
which have sensitive, microscopic hairs called microvilli (say: mye-kro-VILL-eye).
Those tiny hairs send messages to the brain, which interprets the signals and identifies
the taste for you.
Identifying tastes is your brain's way of telling you about what's going into your
mouth, and in some cases, keeping you safe. Have you ever taken a drink of milk that
tasted funny? When the milk hit the taste buds, they sent nerve impulses to your brain:
"Milk coming in — and it tastes funny!" Once your brain unscrambled the nerve
impulses, it recognized the taste as a dangerous one, and you knew not to drink the
Some things can make your taste bud receptors less sensitive, like cold foods or
drinks. An ice pop made from your favorite juice won't taste as sweet as plain juice.
If you suck on an ice cube before you eat a food you don't like, you won't notice
the bad taste.
Friend of the Tongue
Last time you had a cold and
your nose felt stuffed up, did you notice that foods didn't taste as strong as they
usually do? Well, that's because your tongue can't take all of the credit for tasting
different flavors — it has help from your nose.
Your nose helps you taste foods by smelling them before they go in your mouth and
as you chew and swallow them. Strong smells can even confuse your taste buds: Try
holding an onion slice under your nose while eating an apple. What do you taste?
Your tongue also gets help from your teeth, lips, and mouth. Your teeth help your
tongue grind food as the tongue mixes the food around your mouth. And without your
teeth, lips, and the roof of your mouth, your tongue wouldn't be able to form sounds
to make words.
Saliva is also a friend of the tongue. A dry tongue can't taste a thing, so saliva
helps the tongue by keeping it wet. Saliva moistens food and helps to break it down,
which makes it easier for the tongue to push the food back to swallow it.
If all that wasn't enough, your tongue even helps keep you from getting sick. The
back section of your tongue contains something called the lingual tonsil
(say: LIN-gwul TAHN-sul). Lingual is a medical word that means having to do with the
tongue, and tonsils are small masses of tissue that contain cells that help filter
out harmful germs that could cause an infection in the body.
But when you have tonsillitis, it's not your lingual tonsil that's infected. Tonsillitis
affects the palatine (say: PAL-uh-tyne) tonsils,
which are two balls of tissue on either side of the tongue. The lingual tonsil, the
palatine tonsils, and the adenoids
are part of a bigger system that fights infections throughout your body.
The Tongue Is One Tough Worker
With all that talking, mixing food, swallowing, tasting, and germ fighting, does
your tongue ever get a rest?
No. Even when you are sleeping, your tongue is busy pushing saliva into the throat
to be swallowed. It's a good thing, too, or we'd be drooling all over our pillows.
Keep your tongue in tip-top shape by brushing it along with your teeth and avoiding
super-hot foods. A burned tongue is no fun!