digestive system - Emily Richardson Anatomy and Physiology Digestive System The digestive system starts with the mouth When a Mcdonalds cheeseburger

digestive system - Emily Richardson Anatomy and Physiology...

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Emily Richardson Anatomy and Physiology Digestive System The digestive system starts with the mouth. When a Mcdonald’s cheeseburger enters your mouth, the teeth mash and grind the food. The saliva moistens the food and exposes it to enzymes such as salivary amylase, which breaks down the bonds between long branching carbohydrate molecules. Saliva also causes the chewed food to stick together, forming a bolus. The esophagus then squeezes the food down to your stomach. The stomach contains hydrochloric acid. This kills many bacteria and it also helps the enzymes in the stomach to work. Stomach enzymes such as pepsin break down protein into amino acids. Other types of molecules are not as thoroughly digested as protein until reaching the small intestine. After digestion in the stomach, the food moves through the pylorus into the small intestine. The small intestine is the part of the intestines where 90% of the digestion and absorption of food occurs.
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  • Fall '15
  • Gudgeon
  • Physiology, Anatomy, Atom, pH, Emily Richardson, intestine absorbs water, branching carbohydrate molecules

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