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The Human Body
The Digestive System
Term | Definition |
---|---|
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. |