   Digestive   Respiratory   Circulatory   Excretory   Nervous
   In order for your body to get energy the food    we eat must pass through the digestive    system   It is in charge o...
   Take the crackers you have in front of you    and chew them up well..BUT DO NOT    SWALLOW THEM!!!!   Hold them in yo...
   How did the crackers taste as you first    chewed them?
   Describe how the taste changed as you    neared the 5-minute mark?
   What do you think caused the any changes    you experienced?
   Mechanical – the physical breakdown of food    into very small pieces   Chemical – breakdown of large particles into ...
   The digestive system is merely a pathway    where food follows long tubes with a few    compartments   It starts at t...
   This is the first stage of digestion that occurs    in this pathway   Mechanical digestion occurs with the chewing   ...
   When your food is fully chewed your tongue    pushes it to the back of your throat   Swallowing pushes the food down ...
   Deals with the arriving food with a few    processes;    ◦ The muscular stomach wall churns food back and      forth  ...
   Gastric Juice is made up of    ◦   Mucus    ◦   Hydrochloric Acid    ◦   Water    ◦   Digestive Enzymes
   The Hydrochloric Acid and enzymes help    chemically breakdown the larger particles   The mucus helps prevent the gas...
   The average length of an adult human male is    about 22 feet 6 inches or 6.9 meters   In women it is 23 feet 4 inche...
   Chemical digestion continues in the small    intestines   The PANCREAS sends in more digestive    enzymes to further ...
   Once the food has been broken up the small    intestines absorbs as much as it can   To catch as much as possible the...
   The liver produces BILE   Bile is stored in the GALL BLADDER   The gall bladder sends bile into the small    intesti...
   When food reaches large intestines    mechanical and chemical digestion is    complete   They absorb water, vitamins ...
Unit b  - section 3.1 - 3.5 organ systems of the human body
Unit b  - section 3.1 - 3.5 organ systems of the human body
Unit b  - section 3.1 - 3.5 organ systems of the human body
Unit b  - section 3.1 - 3.5 organ systems of the human body
Unit b  - section 3.1 - 3.5 organ systems of the human body
Unit b  - section 3.1 - 3.5 organ systems of the human body
Unit b  - section 3.1 - 3.5 organ systems of the human body
Unit b  - section 3.1 - 3.5 organ systems of the human body
Unit b  - section 3.1 - 3.5 organ systems of the human body
Unit b  - section 3.1 - 3.5 organ systems of the human body
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Unit b - section 3.1 - 3.5 organ systems of the human body

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3.1 Digestive System

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Unit b - section 3.1 - 3.5 organ systems of the human body

  1. 1.  Digestive Respiratory Circulatory Excretory Nervous
  2. 2.  In order for your body to get energy the food we eat must pass through the digestive system It is in charge of breaking down food into small enough parts to be used by cells
  3. 3.  Take the crackers you have in front of you and chew them up well..BUT DO NOT SWALLOW THEM!!!! Hold them in your mouth for 5 minutes….starting…. Answer the questions as you go.
  4. 4.  How did the crackers taste as you first chewed them?
  5. 5.  Describe how the taste changed as you neared the 5-minute mark?
  6. 6.  What do you think caused the any changes you experienced?
  7. 7.  Mechanical – the physical breakdown of food into very small pieces Chemical – breakdown of large particles into smaller particles using ENZYMES.
  8. 8.  The digestive system is merely a pathway where food follows long tubes with a few compartments It starts at the mouth and finishes in the rectum
  9. 9.  This is the first stage of digestion that occurs in this pathway Mechanical digestion occurs with the chewing of the food using teeth Saliva in the mouth moistens food and adds an enzyme called salivary amylase.
  10. 10.  When your food is fully chewed your tongue pushes it to the back of your throat Swallowing pushes the food down your throat into your esophagus The food is pushed towards your stomach by wave-like movement called Peristalsis  They are caused by the contracting and relaxing of muscle tissue around the esophagus
  11. 11.  Deals with the arriving food with a few processes; ◦ The muscular stomach wall churns food back and forth ◦ This mixes the food with the secretions from the wall of the stomach, called GASTRIC JUICE
  12. 12.  Gastric Juice is made up of ◦ Mucus ◦ Hydrochloric Acid ◦ Water ◦ Digestive Enzymes
  13. 13.  The Hydrochloric Acid and enzymes help chemically breakdown the larger particles The mucus helps prevent the gastric juices from digesting the stomach itself The stomach slowly releases the food, which is now a liquid, into the small intestines
  14. 14.  The average length of an adult human male is about 22 feet 6 inches or 6.9 meters In women it is 23 feet 4 inches or 7.1 meters
  15. 15.  Chemical digestion continues in the small intestines The PANCREAS sends in more digestive enzymes to further help the breakdown The small intestines itself releases more enzymes to assist the pancreas
  16. 16.  Once the food has been broken up the small intestines absorbs as much as it can To catch as much as possible the intestines use VILLI – finger like projections that absorb nutrients The absorbed nutrients go directly into the blood stream
  17. 17.  The liver produces BILE Bile is stored in the GALL BLADDER The gall bladder sends bile into the small intestines to assist in more chemical digestion
  18. 18.  When food reaches large intestines mechanical and chemical digestion is complete They absorb water, vitamins and minerals Whatever is left forms into feces and is stored in the rectum

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