Human digestive system

DIGESTIVE SYSTEM Defined for Kids

Digestive System
The timing of defecation is controlled voluntarily by the conscious part of the brain, but must be accomplished on a regular basis to prevent a backup of indigestible materials. Although the digestive enzymes secreted in the mouth began the digestion process, very little digestion takes place in the crop—it is simply a temporary storage pouch. And the leftover waste — parts of the food that your body can't use — goes on to the large intestine. Bile produced by the liver is also used to mechanically break fats into smaller globules. In some birds it is an expanded, muscular pouch near the gullet or throat. Infected plant cells form crown gall or root tumors. Gastric acid is about 0.

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Movie: Digestive System

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. The small intestine say: If you stretched out an adult's small intestine, it would be about 22 feet long 6. The small intestine breaks down the food mixture even more so your body can absorb all the vitamins, minerals, proteins, carbohydrates , and fats.

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: And the leftover waste — parts of the food that your body can't use — goes on to the large intestine.

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. 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. The large intestine has a tiny tube with a closed end coming off it called the appendix say: 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. The story of an imaginary word that managed to sneak past our editors and enter the dictionary.

How we chose 'feminism'. How to use a word that literally drives some people nuts. The awkward case of 'his or her'. Test your visual vocabulary with our question challenge! Explore the year a word first appeared. Definition of digestive system: First Known Use of digestive system Illustration of digestive system. Seen and Heard What made you want to look up digestive system?

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