<p>SBI3U NAME:______The Digestion System</p><p>General Characteristics Two types: Physical: Chemical:</p><p>• Role of organ systems such as the digestive system is to maintain ______: a </p><p>• Remember, systems ______à as we learn, make a mental note of the ______of the digestive and circulatory systems</p><p>• The digestive tract is also called the ______or the ______à a ______open at ______(______and ______) </p><p>• Role is to: </p><p>Structures and Functions</p><p>• Consider that the inside (or ______) of the alimentary canal is actually ______.</p><p>• It is highly specialized to ______and ______it into the ______system</p><p>Structure of the Wall of the Digestive System</p><p>• The inside space of the tube is the ______</p><p>• The entire canal has the same ______. </p><p>• The layers are ______depending on the importance for digestion at that point</p><p>• See handout diagram</p><p>Function of the Layers</p><p>• Mucosa</p><p>• ______lining (direct contact with ______) </p><p>• starts with layer of ______mixed with ______and ______secreting cells </p><p>• forms ______– most pronounced in the ______(includes ______) SBI3U NAME:______• houses special ______that help fight ______(especially in the ______) </p><p>• has a base of ______</p><p>• Submucosa </p><p>• ______tissue to connect mucosa to ______</p><p>• contains ______(ie mucus), ______vessels and ______vessels for ______transport</p><p>• Muscularis </p><p>• ______layer </p><p>• ______layers in opposite directions, ______</p><p>• inner layer ______the GI tract and ______</p><p>• outer layer ______with GI tract and ______</p><p>• only 1 layer in the Peritoneum ______</p><p>• ______muscle for control </p><p>• houses main GI tract nerves </p><p>• Peritoneum/Serosa </p><p>• Serosa is strong ______tissue that surrounds the GI tract. Connected to the serosa is a thin outer layer of cells called ______that support the abdominal organs. SBI3U NAME:______Steps in Digestion</p><p>• 1) ______– acquire food from the environment</p><p>• At this point food is ______to be used by the body</p><p>• Food must be converted to ______that can pass through the walls of the ______</p><p>• 2) ______– preparation of food for absorption</p><p>• i.e. must turn carbohydrates into ______like glucose or fructose (called monosaccharide) </p><p>• Starch (______) à many subunits</p><p>• Not ______</p><p>• To Maltose (______) à two subunits</p><p>• Absorbable</p><p>• To Glucose (______) à one subunit </p><p>• ______</p><p>• ______</p><p>• Solid food is ground up, ______</p><p>• Mostly in ______</p><p>• This helps increase the surface area for ______digestion</p><p>• Teeth </p><p>• Incisors – ______</p><p>• To ______</p><p>• ______included here(largest in ______)</p><p>• Molars – ______SBI3U NAME:______• ______</p><p>• Works on ______components of food</p><p>• Food is mixed with various ______from digestive ______and then ______act upon the broken-down food</p><p>• Creates a ______</p><p>• 3) ______</p><p>• Mostly in ______</p><p>• In ______intestine only ______and ______absorbed</p><p>• 4) Elimination</p><p>• Through ______and ______</p><p>• Part of food not used SPECIALIZED DIGESTIVE SYSTEMS</p>