Digestive System

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Digestive System
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Components

• Gastrointestinal (Gl) tract
• Direct link/path between organs
• Structures
• Mouth
• Oral Cavity
• Pharynx
• Esophagus
• Stomach
• Small Intestine
• Large Intestine
• Gall bladder
• Liver
• Pancreas

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Digestion

• Processing of food
• Types
• Mechanical (physical)
• Chew
• Tear
• Grind
• Mash
• Mix
• Chemical
• Catabolic reactions
• Enzymatic hydrolysis
• Carbohydrate
• Protein
• Lipid

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Digestion

• Phases
• Ingestion
• Movement
• Digestion
• Absorption
• Further digestion

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Esophagus

• The tube that connects your mouth and your
  stomach.
• It is usually closed so that air can enter the
  trachea.
• The pharynx connects to the esophagus and the
  trachea.
• Food goes from the pharynx to the trachea and
  then to the stomach.

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Stomach

• A stretchy bag that holds your food after you
  eat.
• Helps to break food into smaller pieces so your
  body can use it for energy and nutrition

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Esophagus
Stomach
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Small Intestine

• Tube that is 20 feet long.
• Continues to digest food
• Food stays in your small intestine for 4 to 8
  hours

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Small Intestine
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Large Intestine

• Tube that is 5 feet long
• Gets waste from small intestine
• Waste stays for 10 to 12 hours

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Large Intestine
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Gall Bladder

• Storage tank for bile (a greenish-yellow liquid)
  that helps your body break down and use fats
• Located under your liver
• Shaped like a pear

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Gall Bladder
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Liver

• Factory for antibodies and bile
• Stores vitamins and sugars until your body needs
  them

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Liver
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Pancreas

• Helps you digest food by breaking down sugars

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Functions

• Digest the food we eat
• Take the nutrients out of your food so your body
  can use it

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Interesting Facts

• Food is in your digestive system for about 24
  hours

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• Your stomach stretches when you eat like a
  balloon being filled with air

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• You have a trap door called the epiglottis to
  cover your windpipe when you swallow.

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• Your stomach mashes your food the way a baker
  kneads dough for bread.

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Healthy Habits

• Eat foods that are high in fiber like fruits and
  vegetables

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• Drink plenty of water

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• Chew your food completely before you swallow

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Avoid foods high in fat
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Summary

• Functions
• Digests food
• Absorbs nutrients for the body

• Components
• Esophagus
• Stomach
• Small intestine
• Large intestine
• Pancreas
• Liver
• Gall Bladder

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Summary

• Healthy Habits
• Eat high fiber foods
• Drink lots of water
• Chew food well
• Avoid high-fat foods

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Works Cited

• www.tcet.unt.edu/weblibrary/itc/files/bourlan/reso
  urces/the_digestive_system.ppt -
• Microsoft ClipArt
• Microsoft Encarta Encyclopedia
• http//www.innvista.com/health/anatomy/esophag.htm