Major Parts of the Digestive System The structure and function of the main parts of the digestive system 3.0 / 5 based on 1 rating ? BiologyHuman, animal and plant physiologyASAll boards Created by: Anna CrowtherCreated on: 08-04-12 15:20 The Oesophagus carries food from the mouth to the stomach therefore it's adapted for transport rather than for digestion or absorption made up of a thick muscular wall 1 of 7 The Stomach muscular sac inner layer produces enzymes role = store and digest foods (especially protiens) has glands - produce enzymes which digest protien other glands in stomach wall produce mucus mucus prevents stomach being digested by it's own enzymes 2 of 7 The Small Intestine long muscular tube food is further digested by enzymes enzymes - produced in walls and by glands that pour their secretions into it inner walls folded into villi - gives large surface area millions of tiny projections called microvilli, on the epithelial cells of each villus - increases surface area this adapts the small intestine for its purpose - absorbing products of digestion into the bloodstream larger surface area=increased rate of absorption 3 of 7 The Large Intestine absorbs water most of the water thats reabsorbed comes from the secretions of the many digestive glands therefore the food within the large intestine becomes drier and thicker - forms faeces 4 of 7 The Rectum final section of the intestines faeces are periodically stored here before being removed via the anus - during egestion 5 of 7 The Salivary Glands situated near the mouth pass their secretions via a duct into the mouth secretions contain amylase - breaks down starch into maltose 6 of 7 The Pancreas large gland situated below the stomach produces and secretes pancreatic juice this contains protease, lipase and amylase 7 of 7
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