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The Digestive System

EMERY HALL

Created on April 23, 2026

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Click the buttons from top to bottom to learn how food travels through yout digestive system!

The Digestive System

1. The Mouth

By: Emery Hall

2. Throat

3. Stomach

4. Small Intest

5. Large Intest

6. Anus

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The Mouth

the oral cavity is the initial site where food undergoes ingestion. This is followed by mastication, a mechanical process facilitated by the teeth, which reduces the size of food particles. Concurrently, salivary glands secrete saliva, initiating chemical digestion through the action of enzymes like amylase, which begins carbohydrate breakdown. Saliva also serves to lubricate the food mass, forming a bolus conducive to deglutition (swallowing).

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The Throat

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After you chew your food in your mouth, it turns into a soft ball called a bolus. Your tongue pushes this ball to the back of your throat. When this happens, a special little lid called the epiglottis quickly covers the entrance to your windpipe. This is super important because it stops the food from going down the wrong way into your lungs! At the same time, the roof of your mouth closes off your nose. Then, the food smoothly slides into your food pipe (the esophagus) that leads to your stomach.

The Stomach

Once food moves from the throat, it enters the stomach, which acts as a muscular storage organ. Here, the food is vigorously mixed with potent gastric juices, a combination of acids and enzymes. The stomach's acidic environment serves a dual purpose: it neutralizes harmful microbes and begins the chemical breakdown of proteins. This churning and chemical action transforms the food into a semi-liquid substance known as chyme. The stomach then gradually releases this chyme into the small intestine in controlled portions, ensuring efficient processing for subsequent digestion and nutrient absorption.

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The Small Intestine

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Once food has been churned and mixed with digestive juices in the stomach, it becomes a thick, soupy substance called chyme. The stomach then slowly releases this chyme, in small amounts, into the first section of the small intestine, known as the duodenum. This controlled release ensures that the small intestine can effectively process the chyme, adding further digestive enzymes and bile to break it down further for nutrient absorption.

The Large Intestine

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After the small intestine has done its incredible work of absorbing most of the nutrients from the food, what's left is largely indigestible material, water, and electrolytes. This mixture then moves from the end of the small intestine into the beginning of the large intestine. The primary role of the large intestine is to absorb most of this remaining water, thereby concentrating the waste products. As water is removed, the material solidifies into feces, which are then moved along the large intestine for storage and eventual elimination from the body.

The Anus

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The processed waste, having had most of its water removed by the large intestine, is moved towards the final exit. This material is held briefly before being expelled from the body through the anus.

Extra Information

4. The small intestine is long and narrow with a folded lining covered in villi and microvilli to maximize nutrient absorption, while the large intestine is shorter and wider, primarily focused on absorbing water and electrolytes, and lacks these villi.

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1. The digestive system has two main divisions: the Gastrointestinal (GI) Tract, a continuous tube from mouth to anus where food travels, and the Accessory Digestive Organs (like the liver, gallbladder, and pancreas), which produce helpful substances for digestion but food doesn't pass through them.

5. The scientific term for eating is ingestion, and for excrement, it's defecation.

6. This system is important because it provides the body with the essential nutrients and energy it needs to function and survive.

2. The digestive system's three main functions are digestion (breaking down food), absorption (taking in nutrients), and elimination (removing waste).

7. Three common disorders of the digestive system include Gastroesophageal Reflux Disease (GERD), where stomach acid flows back into the esophagus; Irritable Bowel Syndrome (IBS), a condition affecting the large intestine causing pain, bloating, and changes in bowel habits; and Peptic Ulcers, which are sores that develop in the lining of the stomach or small intestine.

3. Mucus in the digestive system acts as a lubricant, helping food slide smoothly along the GI tract, and also serves as a protective barrier, shielding the lining of the digestive organs from harsh digestive juices and enzymes.

8. 5 medical jobs associated with the digestive system are Gastroenterologist, Dietitian/Nutritionist, Colorectal Surgeon, Endoscopist, and Gastroenterology Nurse