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Digestive System 1. 2. 3. 4. Mouth Esophagus Stomach Small Intestine 5. Large Intestine 6. Rectum 7. Anus Types of Digestion 1. Mechanical – chewing or Mastication 2. Chemical • 1. Mechanical – chewing and cutting food • 2. Salivary Glands Saliva Flow • 1. Smell • 2. Sight • 3. Taste Bolus and Peristalsis • • • • 1. Two layers of muscle in the esophagus 2. Three layers of muscle in the stomach 3. Hydrochloric acid found in the stomach 4. Pyloric valve found at end of stomach Lining of the Small Intestine Large Intestine Large Intestine - Colon • 1. Removes water from non-digestible food • 2. About as long as you are tall, five to six feet on average and about two inches in diameter which is why it is called large. The small intestine is about one inch in diameter Rectum • 1. Stores the solid wastes Proper Terminology • 1. The removal of solid wastes through the anus to outside of the body is called Defecation • 2. The elimination of liquid wastes through the penis to outside the body is called Urination Time of Digestion • • • • • Esophagus – 5 to 6 seconds Stomach - 2 to 4 hours Small Intestine – 5 to 6 hours Colon or L.I. – 12 to 24 hours Time from entering one end to leaving the other end probably ranges from 20 to 30 hours