DIGESTIVE SYSTEM

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DIGESTIVE SYSTEM

• Mr. Scisly
• 6th Grade Health
• http//kidshealth.org/kid/htbw/_bfs_DSmoviesource.
  html

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What Happened to the Apple?
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Digestive System

• 3 Functions
• Digestion- Breaks down food into simpler
  substances (Nutrients)
• Absorption- Nutrients are absorbed into the blood
  and carried throughout the body
• Elimination- Wastes are eliminated from the body

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Digestive System Diagram
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2 Types of Digestion

• Mechanical
• Chemical

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The Mouth

• Mechanical Digestion- Teeth
• Chemical Digestion- Saliva
• Ptyalin- Chemical in Saliva that breaks down
  starches

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Epiglottis

• Seals off your windpipe when you swallow food

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Esophagus

• A muscular tube that connects the mouth to
  stomach
• Peristalsis- Involuntary muscular contractions
  the push food toward the stomach

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Stomach

• J shaped organ located in the abdomen where the
  majority of mechanical digestion occurs.

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Stomach

• Mechanical Digestion- Churning motion like a
  washing machine
• Chemical Digestion- (Gastric Juice) Pepsin and
  Rennin digest Proteins

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Guided Practice

• Work on numbers 1-6 ONLY on page 7 in your
  packet.

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What Happened to the Apple?
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Final Digestion and Absorption

• Small Intestine- Part of the digestive system
  where the majority of chemical digestion takes
  place, as well as the absorption of nutrients

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Liver

• The largest and heaviest organ inside the body
  that produces Bile.
• Bile- Chemical made by the liver that breaks down
  fats. (Stored in gall bladder.)

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Pancreas

• Triangular shaped organ that make pancreatic
  juices, which are enzymes that break down
  starches, proteins, and fats.

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Absorption in the Small Intestine

• Villi- Fingerlike projections that increase
  surface area in the small intestine for the
  absorption of nutrients.

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Elimination

• Large Intestine- Where water is absorbed and
  waste is readied for elimination.
• Rectum- A short tube at the end of the large
  intestine where solid waste is stored
• Anus- a Muscular opening at the end of the rectum
  where waste is eliminated from the body

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Guided Practice

• Complete page 7 in your packet.
• WORD BANK
• Liver Small Intestine Ptyalin Esophagus
• Enzymes Stomach Peristalsis Pepsin
• Complete page 8 in your packet

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