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Chapter 15

Digestive System

Alimentary canal/gastrointestinal tract The term to describe the overall set of organs and tube that makes up the digestive system. The tube begins with the mouth and ends with the anus.
Functions of digestive system 1) Ingest food 2) Break food down into small molecules 3) absorb nutrients from molecules 4) eliminate non-digestible wastes.
Mouth/Oral Cavity Parts of mouth: teeth, tongue, salivary glands, hard and soft palate, uvula.
Saliva A mixture of mucous and water that contains bicarbonate and salivary amylase to begin breaking down carbohydrates.
Pharynx The area where the food passage and air passage cross. Composed of three parts: nasopharynx, oropharynx, and the laryngopharynx.
Bolus The technical term for the swallowed item, whether it is food or drink.
Layers of the stomach mucosa, submucosa, muscularis, and serosa
Esophagus The muscular tube that lies posterior to the trachea. The passage way of food from the pharynx to the stomach.
Peristalsis The rhythmic contraction that pushes food along the alimentary canal.
Created by: Mr.Klein