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The Human Body

The Digestive System

Major Functions of Digestive Systems Breaks down food into small molecules for use by the body and nutrients are absorbed by blood once digestion is complete.
Steps in Digestion Chemical break down food down into nutrients, nutrients are moved into the blood, and blood moved nutrients to each of the body's cells.
Major Organs in Digestive System Mouth, esophagus, stomach, small intestine, pancreas, liver, large intestine, and rectum.
Mouth releases saliva, which helps to break down starches into simple sugar.
Esophagus Muscular tube that connects the mouth to the stomach
Stomach Jshape pouch that expands to hold all the food that is swallowed.
small intestine where most digestion occurs and usable nutrients are absorbed into the blood stream.
pancreas produces a juice that contains a wide array of enzymes to break
Liver Largest and heaviest organ in the body. Produces bile which emulsifies or liquidizes fat globules.
Large Intestine The colon. This is where water is absorbed d from food and the remaining waste material is prepared for elimination from the body.
Rectum Stores solid waste produced by digestion until the execretory system removes it out of the anus.
Mechanical Digestion involves mixing grinding or crushing large pieces of food into small pieces and most occurs in mouth and stomach
Chemical Digestion occurs when digestive enzymes break down complex molecules such as carbohydrates into simple molecules such as glucose. The small intestine is where most chemical digestion happens.
Pathway of Digestion mouth to esophagus to stomach to small intestine to large intestine to rectum to anus
Digestive System and other systems Provides nutrition and energy to all systems.
Created by: 200371966



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