The Digestive System. What is the function of the digestive system?  Convert and break down foods into simpler molecules that can be absorbed by the.

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Presentation transcript:

The Digestive System

What is the function of the digestive system?  Convert and break down foods into simpler molecules that can be absorbed by the body.

Mouth  Chemical /physical breakdown of food  Masticate-chew  Amylase breaks down carbs

Esophagus  Epiglottis prevents food from entering trachea  Muscular tube that connects your mouth and your stomach  Peristalsis moves food to the stomach

Stomach  Muscular sac  Mechanical/chemical  Muscles contract and churn food+digestive juices  chyme  HCl,Pepsin  digests protein  No digestion of carbs

Small Intestine  20 ft  Food stays 4-8 hrs.  Absorption of nutrients

Villi fingerlike projections which line the walls of s.intestine/absorbs nutrients

Large Intestine  5 ft.  Water absorption  Indigestible materials stay hrs.  Leads to rectum/anus

Liver  Biggest organ  Detoxifies poisons

Pancreas  Secretions neutralize stomach acid  Secretes insulin, helps cells absorb glucose

Healthy Habits  Eat food high in fiber  Drink water

hw Comic Strip

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