April 2, 2014 1. DO NOT TOUCH Bob the skeleton OR Junior the Organ model. 2. What is the function of...
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![Page 1: April 2, 2014 1. DO NOT TOUCH Bob the skeleton OR Junior the Organ model. 2. What is the function of the Digestive System? 3. Can you name all the organs.](https://reader035.fdocuments.in/reader035/viewer/2022081519/56649e545503460f94b4a960/html5/thumbnails/1.jpg)
April 2, 2014
• 1. DO NOT TOUCH Bob the skeleton OR Junior the Organ model.
• 2. What is the function of the Digestive System?
• 3. Can you name all the organs in the digestive system?
![Page 2: April 2, 2014 1. DO NOT TOUCH Bob the skeleton OR Junior the Organ model. 2. What is the function of the Digestive System? 3. Can you name all the organs.](https://reader035.fdocuments.in/reader035/viewer/2022081519/56649e545503460f94b4a960/html5/thumbnails/2.jpg)
The Digestive System
Hey- chew on this! We’ve made it to the..
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Functions
• Ingest food
• Break down food
• Move through digestive tract
• Absorb digested food and water
• Eliminates waste materials
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There are 3 Macronutrients
• Carbohydrates (Carbs)
• Proteins (ex: meat)
• Lipids (fats)
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Carbohydrate
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Protein
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Fat (aka: Lipids)
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• Gastrointestinal System• Function-physical and
chemical breakdown of food
• Accessory organs: Salivary glands, tongue, teeth, liver, gallbladder, and pancreas
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Mouth
• Mouth- physical and chemical breakdown.
• Physical Digestion: chewing
• Chemcial Digestion: Saliva contains enzyme amylase to break down carbohydrates
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Mouth
• Breaks down food into small pieces
• Begins starch digestion (amylase)
• Saliva produces amylase and lubricates food
• Moves food into esophagus
• Epiglottis covers trachea
• Peristalsis moves food to stomach
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• Pharynx- contains opening to trachea as well.
• Epiglottis covers opening of trachea.
• Esophagus- the tube you swallow food with.
• Uses peristalsis – wave-like motion to push food down.
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Peristalsis
The wave-like squeezing action of muscles that is used to move food along
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Esophagus- transverse view
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• Sphincter-a circular muscle sqeezes shut
• Food sits in stomach for 1-4 hours. Gastric (stomach) juices contain hydrochloric acid- activates pepsin, kills bacteria.
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• Small intestine: not so small! 20ft x 1’’
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• Small intestine has lots of enzymes called peptidases
• Digested food is absorbed into the bloodstream.
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• Large intestine- 5 ft x 2’’.
• Final absorption of water, storage of indigestible material, absorption of vitamins B and K by bacteria.
• Colon connects to rectum- anal canal opens to the anus (final opening). This is where your poop sits before… you “sit” ;) .
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But Wait! What about the accessory organs: Liver, gall bladder and pancreas • Liver- largest gland in
your body• Secretes bile- digests
fat.• Detoxifies blood
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• Gall bladder- stores and concentrates bile (which digests fats)
• Pancreas- produces insulin. – Insulin regulates the
uptake of glucose by the cells