digestion clip by brainpop - plainview · 2014-06-11 · •password = brainpop •view the...
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Digestion is the process of breaking
food into small molecules so that they can be used by the
body.
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Nutrients…
• Are substances in food that provide energy and materials for cell development, growth, and repair.
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TWO TYPES OF DIGESTION
• Mechanical or Physical: breaking food down by cutting, chewing and grinding.
• Chemical: breaking food into small molecules through chemical reactions with enzymes.
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Enzymes
Enzymes are molecules that speed up the rate of chemical reactions
They do this without being changed or used up.
Enzymes also speed up reactions by reducing amount of energy necessary for a chemical change to begin.
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Digestive Enzymes are:
AMYLASE is an enzyme secreted in the mouth. This enzyme breaks down carbohydrates. (starches)
PEPSIN, found in the stomach, causes complex proteins to break down into less complex proteins.
Enzymes are also responsible for MANY chemical reactions in your body---not just the ones involved in digestion!
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The Digestive System
Purpose: to convert food particles into
simpler molecules that can be absorbed
into bloodstream and used by the body
Major Organs : The Alimentary Canal
Mouth
Esophagus Organs that the food will pass
Stomach
Small intestine through
Large intestine
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Pancreas –
Liver –
Gallbladder –
Helper Organs
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Your Digestive System
Mouth: Begins chemical & mechanical digestion, glands in mouth produce saliva, which contains amylase, which breaks down starch
MOUTH
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Your Digestive System
Esophagus: muscular tube that connects throat to stomach. Moves food down by squeezing (peristalsis)
ESOPHAGUS
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Your Digestive System
Stomach: muscular bag where chemical and mechanical digestion continue; food stays here ~4 hours, changes to chyme a thick oatmeal like liquid.
STOMACH
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Small Intestine: tube nearly 7 meters long where digestive juices from liver and pancreas are added; villi absorb molecules from chyme
All digestion is completed here.
Small Intestine
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Pancreas: a small organ that produces substances that stop the action of stomach acid, makes enzymes that break down carbohydrates
PANCREAS
HELPER ORGANS
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Helper organs
Liver: produces bile, which is stored in gall bladder. Bile breaks up large particles of fats into smaller particles.
fat
Fat
droplets
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Helper organs
Gall Bladder: small sac that stores bile produced by liver
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Your Digestive System
Large Intestine: absorbs water from undigested food, where unabsorbed materials become more solid
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Your Digestive System
Rectum: where solid wastes (feces) are stored.
ANUS: muscles control the release of solid wastes from the body
RECTUM
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1) MOUTH
2) ESOPHAGUS
3) STOMACH
4) SMALL
INTESTINE
5) LG. INTESTINE
6) RECTUM
LIVER
GALL BLADDER PANCREAS
ALIMENTARY CANAL HELPER ORGANS
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• Go to brainpop.com.
• Log in pobms
• Password = brainpop
• View the
• Answer the questions
Digestive System Clip by Brainpop
Digestive System Clip by Brainpop