Digestive system labeling

Digestive system labeling DEFAULT

Regions of the Digestive System

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At its simplest, the digestive system is a tube running from mouth to anus. Its chief goal is to break down huge macromolecules (proteins, fats and starch), which cannot be absorbed intact, into smaller molecules (amino acids, fatty acids and glucose) that can be absorbed across the wall of the tube, and into the circulatory system for dissemination throughout the body.

Illustration mapping the locations of the various organs that make up the digestive system

Regions of the digestive system can be divided into two main parts: the alimentary tract and accessory organs. The alimentary tract of the digestive system is composed of the mouth, pharynx, esophagus, stomach, small and large intestines, rectum and anus. Associated with the alimentary tract are the following accessory organs: salivary glands, liver, gallbladder, and pancreas.

To learn more about the regions of the digestive system, use the hyperlinks listed below to branch into a specific topic.

  1. Alimentary Tract of the Digestive System
  2. Accessory Organs of the Digestive System
Module Map
Sours: https://training.seer.cancer.gov/anatomy/digestive/regions/

Label a cow’s digestive passage

Ruminants are mammals with specialised digestive systems that use fermentation processes to gain nutrients from plant material. Cattle, sheep, horses, deer, goats and camels are all ruminants and have adaptations to allow them to thrive on a plant-only diet. 

In this interactive, you can label parts of the cow’s digestive passage. Use your mouse or finger to hover over a box to highlight the body part to be named. Drag and drop the text labels onto the boxes next to the simplified diagram of a cow’s digestive system.

If you want to redo an answer, click on the box and the answer will go back to the top so you can move it to another box. If you want to check your answers, use the Reset Incorrect button. This will reset incorrect answers only. When you are happy with your selection, use the Check answers button to check them. Use Reset All to practise again from the start. Selecting or hovering over a box will highlight each area in the diagram.

For optimal viewing of this interactive, view at your screen’s default zoom setting (100%) and with your browser window view maximised.

See the Explore a cow's digestive system activity for additional support in using this interactive.




A cow uses her tongue to grasp a clump of grass and pull it into her mouth.


Its main role is to act as a filter, trapping larger feed particles that require further mastication.


This is the fermentation vat. It is the largest part of the stomach.


Called the true stomach, it has a similar function to stomachs found in other animals, like humans.


It is made up of lots of leaf-like projections, creating a large surface area to absorb water.

Small intestine

It is about 40 metres long and is where additional digestion and absorption of nutrients occurs.

Large intestine

This is the final part of the digestive tract. Its main function is to absorb water and minerals.


This is a circular muscle that controls the expulsion of waste from the digestion process.

Use the DOWNLOAD EXERCISE button for a PDF version of this interactive.


This resource has been produced with the support of DairyNZ.

Sours: https://www.sciencelearn.org.nz/labelling_interactives/13-label-a-cow-s-digestive-passage
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Your Digestive System

Even before you eat, when you smell a tasty food, see it, or think about it, digestion begins. Saliva (say: suh-LYE-vuh), or spit, begins to form in your mouth.

When you do eat, the saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow. Your tongue helps out, pushing the food around while you chew with your teeth. When you're ready to swallow, the tongue pushes a tiny bit of mushed-up food called a bolus (say: BO-luss) toward the back of your throat and into the opening of your esophagus, the second part of the digestive tract.

On the Way Down

The esophagus (say: ih-SOF-eh-guss) is like a stretchy pipe that's about 10 inches (25 centimeters) long. It moves food from the back of your throat to your stomach. But also at the back of your throat is your windpipe, which allows air to come in and out of your body. When you swallow a small ball of mushed-up food or liquids, a special flap called the epiglottis (say: ep-ih-GLOT-iss) flops down over the opening of your windpipe to make sure the food enters the esophagus and not the windpipe.

If you've ever drunk something too fast, started to cough, and heard someone say that your drink "went down the wrong way," the person meant that it went down your windpipe by mistake. This happens when the epiglottis doesn't have enough time to flop down, and you cough involuntarily (without thinking about it) to clear your windpipe.

Once food has entered the esophagus, it doesn't just drop right into your stomach. Instead, muscles in the walls of the esophagus move in a wavy way to slowly squeeze the food through the esophagus. This takes about 2 or 3 seconds.

See You in the Stomach

Your stomach, which is attached to the end of the esophagus, is a stretchy sack shaped like the letter J. It has three important jobs:

  1. to store the food you've eaten
  2. to break down the food into a liquidy mixture
  3. to slowly empty that liquidy mixture into the small intestine

The stomach is like a mixer, churning and mashing together all the small balls of food that came down the esophagus into smaller and smaller pieces. It does this with help from the strong muscles in the walls of the stomach and gastric (say: GAS-trik) juices that also come from the stomach's walls. In addition to breaking down food, gastric juices also help kill bacteria that might be in the eaten food.

Onward to the small intestine!

22 Feet Isn't Small at All

The small intestine (say: in-TESS-tin) is a long tube that's about 1½ inches to 2 inches (about 3.5 to 5 centimeters) around, and it's packed inside you beneath your stomach. If you stretched out an adult's small intestine, it would be about 22 feet long (6.7 meters) — that's like 22 notebooks lined up end to end, all in a row!

The small intestine breaks down the food mixture even more so your body can absorb all the vitamins, minerals, proteins, carbohydrates, and fats. The grilled chicken on your pizza is full of proteins — and a little fat — and the small intestine can help extract them with a little help from three friends: the pancreas (say: PAN-kree-uss), liver, and gallbladder.

Those organs send different juices to the first part of the small intestine. These juices help to digest food and allow the body to absorb nutrients. The pancreas makes juices that help the body digest fats and protein. A juice from the liver called bile helps to absorb fats into the bloodstream. And the gallbladder serves as a warehouse for bile, storing it until the body needs it.

Your food may spend as long as 4 hours in the small intestine and will become a very thin, watery mixture. It's time well spent because, at the end of the journey, the nutrients from your pizza, orange, and milk can pass from the intestine into the blood. Once in the blood, your body is closer to benefiting from the complex carbohydrates in the pizza crust, the vitamin C in your orange, the protein in the chicken, and the calcium in your milk.

Next stop for these nutrients: the liver! And the leftover waste — parts of the food that your body can't use — goes on to the large intestine.

Love Your Liver

The nutrient-rich blood comes directly to the liver for processing. The liver filters out harmful substances or wastes, turning some of the waste into more bile. The liver even helps figure out how many nutrients will go to the rest of the body, and how many will stay behind in storage. For example, the liver stores certain vitamins and a type of sugar your body uses for energy.

That's One Large Intestine

At 3 or 4 inches around (about 7 to 10 centimeters), the large intestine is fatter than the small intestine and it's almost the last stop on the digestive tract. Like the small intestine, it is packed into the body, and would measure 5 feet (about 1.5 meters) long if you spread it out.

The large intestine has a tiny tube with a closed end coming off it called the appendix (say: uh-PEN-dix). It's part of the digestive tract, but it doesn't seem to do anything, though it can cause big problems because it sometimes gets infected and needs to be removed.

Like we mentioned, after most of the nutrients are removed from the food mixture there is waste left over — stuff your body can't use. This stuff needs to be passed out of the body. Can you guess where it ends up? Well, here's a hint: It goes out with a flush.

Before it goes, it passes through the part of the large intestine called the colon (say: CO-lun), which is where the body gets its last chance to absorb the water and some minerals into the blood. As the water leaves the waste product, what's left gets harder and harder as it keeps moving along, until it becomes a solid. Yep, it's poop (also called stool or a bowel movement).

The large intestine pushes the poop into the rectum (say: REK-tum), the very last stop on the digestive tract. The solid waste stays here until you are ready to go to the bathroom. When you go to the bathroom, you are getting rid of this solid waste by pushing it through the anus (say: AY-nus). There's the flush we were talking about!

Dig That Digestive System

You can help your digestive system by drinking water and eating a healthy diet that includes foods rich in fiber. High-fiber foods, like fruits, vegetables, and whole grains, make it easier for poop to pass through your system.

The digestive system is a pretty important part of your body. Without it, you couldn't get the nutrients you need to grow properly and stay healthy. And next time you sit down to lunch, you'll know where your food goes — from start to finish!

Sours: https://kidshealth.org/en/kids/digestive-system.html

The Structure of the Digestive System

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Sours: https://www.storyboardthat.com/lesson-plans/the-digestive-system/label-diagram

Labeling digestive system

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Labeling the Digestive System - Stay Curious

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