What’s a Cleft Lip or Cleft Palate?
What’s a Cleft Lip or Cleft Palate?
The word cleft means a gap or split between two things. A cleft lip is a split in the upper lip. This can happen on one or two sides of the lip, creating a wider opening into the nose. A cleft palate is a split in the roof of the mouth. This leaves a hole between the nose and the mouth.
Sometimes a cleft lip and cleft palate occur together. Cleft lip and cleft palate are very common and occur in about 1 or 2 of every 1,000 babies born in the United States each year.
Cleft lip and cleft palate are birth defects. This means they happen while a baby is developing. Normally, the mouth and nose of a baby develop between the first 6 and 12 weeks of growth inside the mother. In some babies, parts of the lips and roof of the mouth don’t grow together. Because the lips and the palate develop separately, it’s possible to have cleft lip alone, cleft palate alone, or both together.
We don’t always know why a particular baby has cleft lip or cleft palate. Sometimes the condition runs in families. This means that a person with cleft lip or cleft palate may have a relative with the same thing.
Other times, cleft palate is part of a syndrome, meaning there are birth defects in other body parts, too. Sometimes a cleft may be related to what happened during a mother’s pregnancy, like a medication she may have taken, a lack of certain vitamins, or exposure to cigarette smoke. Most of the time, however, the cause of the cleft is unknown.
Source: kidshealth.org
The Tongue Is One Tough Worker
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!
Source: kidshealth.org
Fighting Germs
Fighting Germs
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: ling-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: pah-luh-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.
Source: Kidshealth.org
Friend of the Tongue
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.
Source: Kidshealth.org
Traveling Tastes
Traveling Tastes
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-vih-lye). 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 milk.
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.
Source: kidshealth.org
Tasty Tidbits
Tasty Tidbits
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-pih-lee).
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.
Source: Kidshealth.org
Tongue Held Down Tight
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!
Source: Kidshealth.org
Tongue Twister
Tongue Twister
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 sounds.
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.
Source: Kidshealth.org
Tooth Growth and Development
What’s the difference between “baby” teeth and permanent teeth? At between six and ten months of age, most infants begin to get their “baby” teeth.
The Central Incisors (front middle teeth) usually come in first, and then teeth begin appearing on either side and work their way back to the second molars. By the time a child has reached three years old, most of the “baby” teeth should be present.
The process begins to repeat itself when the child is about seven years old. The Central Incisors fall out first and are replaced by permanent teeth. By the age
of 21, most people have all of their permanent teeth.
“Baby” teeth are important because they hold the place for permanent teeth and help guide them into correct position. “Baby” teeth play an important role in the development of speech and chewing.
The Parts of a Tooth
A tooth is basically made up of two parts: the crown and the root.
The crown is what you see when you smile or open your mouth. It’s the part that sits above your gumline.
The root is below the gumline. It makes up about 2/3rds of the tooth’s total length.
Four different tissues make up each tooth. The enamel is the durable, white covering. Enamel protects the tooth from the wear and tear of chewing.
Dental Fact: did you know that the enamel on your teeth is the hardest substance in your body?
Dentin supports the enamel on your teeth. It’s a yellow bone-like material that’s softer than enamel and carries some of the nerve fibres that tell you when something is going wrong inside your tooth.
The Pulp is the centre of the tooth. It’s a soft tissue that contains blood and lymph vessels, and nerves. The pulp is how the tooth receives nourishment and transmits signals to your brain.
Cementum is what covers most of the root of the tooth. It helps to attach the tooth to the bones in your jaw. A cushioning layer called the Periodontal Ligament sits between the cementum and the jawbone. It helps to connect the two.
Source: healthyteeth.org