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Digestive Health & Nutrition in Children

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You are here: Home / Child’s Digestive System

Child’s Digestive System

abdomen anatomyA child's dgestive system consists of parts of the body working together to change the food and liquids we eat and drink, into the fuel and building blocks our bodies need. Digestion, the process of breaking down food, may take several hours to a few days, depending on what you eat. Each body part in the digestive system:  mouth, esophagus, stomach, small intestine, pancreas, liver, gallbladder, large intestine, colon, and rectum, plays an important role in digestion.

Anatomy and Function of a Child's Digestive System

Mouth

The mouth starts the digestive process by producing saliva (suh-LYE-vuh), even before eating begins.  Thinking about, or seeing a tasty food will trigger saliva (spit) to form, beginning the digestive process. As food enters the mouth, it is broken down into smaller pieces by your teeth, while the tongue aides in the mixing process. Processed food in the mouth, ready to be swallowed, is called a bolus (BO-luss). The bolus will pass into the back of the throat, and on to the second part of the digestive track, the esophagus.

Esophagus – Food Pipe

gi tract digestive system

The esophagus (ih-SOF-eh-guss) is a stretchy tube approximately 10 inches (25 centimeters) long in adults, that moves food from the throat to the stomach.  Muscular contractions in the walls of the esophagus continue the digestive process by slowly squeezing the food until it reaches the stomach, in about two to three seconds.

The esophagus is one of two tubes, or pipes, extending from the back of the throat. The second tube is the windpipe that allows air intake, but also blocks food from entering it. At the top of the windpipe is a special flap called the epiglottis (ep-ih-GLOT-iss), which opens when you breathe and closes when food is swallowed to ensure that food goes into the esophagus, rather than the windpipe, as it travels to your stomach.  Occasionally, the epiglottis does not close entirely, such as when a person eats too fast, which will cause involuntary coughing.  Coughing clears the windpipe of any food that accidentally entered it.  When this happens, you will often hear it referred to as "going down the wrong pipe".

Stomach

The stomach, a hollow, stretchy sack similar in shape to the letter J, is attached to the end of the esophagus.  The stomach has three important tasks:

  1. Stores food that has entered through the esophagus
  2. Breaks down stored food into a more liquid form
  3. Slowly empties the liquid mixture into the small intestine

Stomach muscles continue the digestive process by churning and mashing the food into a more usable form.  Enzymes in the gastric (GAS-trik) juices secreted from glands in the stomach walls, aid the breakdown process and help kill bacteria that may have been eaten. From here, the food is very liquid and ready to be released to the small intestine.

Small Intestine – Duodenum, Jejunum and Ileum

The small intestine (in-TESS-tin) is a tightly packed tube in the abdomen, below the stomach. It measures approximately 1½ to 2 inches (about 3.5 to 5 cm) around and if stretched out, is about 20 feet (6 m) long in adults. The top end connects to the stomach, the bottom end to the large intestine (colon). The lining of the small intestine is made of tiny, finger-shaped tissues called villi (VIL-le). These raised tissues increase the surface area of the small intestine where calories and nutrients from the food consumed, will be digested and absorbed.

Three parts make up the small intestine – the duodenum (du-o-DE-num ), jejunum (je·JU·num), and ileum (IL·e·um).

  1. Duodenum – first part of the small intestine where the food mixture is combined with digestive enzymes from the pancreas (PAN-Kre-as) to break down fats, proteins and carbohydrates, while bile, from the liver or stored in the gallbladder, helps absorb fats
  2. Jejunum – middle section of the small intestine; responsible for absorption of nutrients into the blood stream
  3. Ileum – third section of the small intestine and attached to the large intestine; responsible for absorption of nutrients into the bloodstream.

Food may spend as long as four hours in the small intestine. After the nutrients are absorbed, the leftover food residue is passed into the large intestine, or colon.

Large Intestine – Cecum, Colon, Rectum and Anal Canal

The large intestine is also packed into the body, and would measure approximately 5 feet (about 1.5 meters) long if spread out.  It is larger around and a highly specialized organ where water is eliminated and waste is processed so it can be eliminated easily through the rectum (REK-tum).

  1. Cecum – Attached to the first section (cecum) of the large intestine is a tiny tube with a closed end, called the appendix (uh-PEN-dix). It is part of the digestive tract, but does not seem to have much purpose, though sometimes it can get infected, causing real problems and needs to be removed.
  2. Colon – Before waste is eliminated, it passes through the large intestine called the colon (CO-lun), where the body gets its last chance to absorb water and minerals into the bloodstream.  As the water leaves the waste product in the colon, what's left gets harder and harder as it keeps moving along, until it becomes a solid. The colon then pushes the waste (poop) into the rectum.
  3. Rectum – Solid waste is held in the rectum, the small tube attached to the end of the large intestine, until you are ready to go to the bathroom.  The last part of the digestive system is the anus (AY-nus). When you go to the bathroom, you get rid of this solid waste by pushing it through the anus.

A Child's Digestive System

Help your digestive system stay healthy by drinking lots of water and eating a healthy diet. Eating foods rich in fiber, and plenty of fruits, vegetables and whole grains will help your body grow properly and stay healthy. Getting regular exercise also helps your digestive system move and operate at its best.

If you would like more information about gastrointestinal (GI) digestive disorders and nutrition in children, please contact Dr. Mona Dave’s Plano Office or Southlake Office.

 

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Digestive Health & Nutrition in Children

About Our Practice

Our offices are convienently located in Plano and Southlake, TX. We are dedicated to providing the highest quality of patient care. Dr. Dave and her staff work extremely hard to streamline the referral process, expedite appointment scheduling, and promptly respond to patient calls. Her practice offers a pure pediatric environment. A pediatric trained … Dr. Manisha "Mona" Dave

MOM-APPROVED DOCTOR – DFW CHILD MAGAZINE

Mona Davé, MD

Manisha “Mona” Harpavat Dave, MD Pediatric Gastroenterologist Digestive Health & Nutrition in Children Diplomate Certification in Pediatric Gastroenterology Diplomate, American Board of Pediatrics Awards and Honors          Scientific Research Plano Office 6300 W Parker Rd, Bldg 2, Suite 424 Plano, TX 75093 Phone: … Dr. Mona Dave

Belly Pain in Kids

Abdominal (Belly) Pain in Children

Abdominal (belly) pain in children is a common condition and, while not generally a serious problem, one that can cause considerable discomfort. Approximately 30% of children visit a doctor due to abdominal pain by age 15, and 10-15% of school aged children report recurring abdominal pain. Because abdominal pain can have a wide variety of causes, diagnosis can often be … Belly Pain

Celiac Disease in Children

Celiac disease (CD, Celiac Sprue, Gluten Intolerance) in children tends to have digestive disorders that may result in growth problems. Celiac disease prevents the body from absorbing essential nutrients (nutrient malabsorption) resulting in diarrhea, weight loss, abdominal distention, failure to thrive and muscle wasting. Celiac disease in teenagers may not occur … Celiac Disease

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Digestive Health & Nutrition

Manisha “Mona” Dave, MD
Pediatric Gastroenterologist
Texas Digestive Disease Consultants
 

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Plano, TX 75093

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505 South Nolen Drive
Southlake, TX 76092

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