The Digestive System PDF

The Digestive System There is a food(s) that I need to be careful not to eat, or in strict moderation. True False Two types of digestion Physical or mechanical-make smaller pieces, increase surface area for chemical digestion to act upon Chemical-...

The Digestive System There is a food(s) that I need to be careful not to eat, or in strict moderation. True False Two types of digestion Physical or mechanical-make smaller pieces, increase surface area for chemical digestion to act upon Chemical-break bonds to make monomers from polymers starch-sugar protein-amino acids Absorption vitamins --water --minerals carbohydrates -- proteins --lipids  Mouth Teeth-physical molars and incisors Tongue rolling food into a ball Saliva-chemical & physical three functions dissolves food starch digestion-amylase breaks starch into maltose kills bacteria Bolus-name for food particles when swallowed * I have choked on food at least once a year. Agree Disagree  Parts Epiglottis-keeps food out of trachea Pharynx-nose/mouth connection Esophagus-made of smooth muscle, about 25 cm long, takes bolus about ten seconds to get to stomach Peristalsis-rhythmic contractions of smooth muscle to push food along * Peristalsis I have had heartburn in the last year. True False Stomach Mucus-protects cells from acid HCl-low pH helps break bonds Protein digestion-most all protein are digested in the stomach *  Chyme-what bolus is called after the stomach sphincter-one at each end of the stomach to let stuff in and out ph of about 2.3 which is very acidic *  Small Intestine The small intestine is about 21 feet long!(6m)*  Villi-about 5 million folds in the small intestine increase surface area for absorption to occur Carbohydrate digestion-the rest of the carbohydrates are digested in the s.i.*  Large Intestine or Colon Minerals and vitamins are absorbed in the large intestine. It is about 1.5m long. Feces-solid waste Water removal constipation and diarrhea occur when the amount of water removal is incorrect * I believe that I consume the appropriate amount of water each day. Agree Disagree  Rectum - the lower part of the large intestine, where feces are stored before they are excreted. Anus - the opening at the end of the digestive system from which feces (waste) exits the body *