PHS 1200 Lecture Notes - Lecture 8: Hiatus Hernia, Peptic Ulcer, Gastric Mucosa

• School: University of Ottawa
• Department: Physiology
• Course: PHS 1200
• Professor: Frank Feiner

Document Summary

Ingestion: process of taking food into the digestive tract. Propulsion: move food through the digestive tract: swallowing initiated voluntarily, peristalsis involuntary, alternate waves of contraction and relaxation of muscles. Mechanical digestion: chewing, mixing with saliva (tongue), churning food in stomach, segmentation (intestines) Chemical digestion: due to action of secreted intestines, begins in mouth: completed in small intestine. Absorption: movement of products into blood or lymph (primarily in small intestine) Usually problems and diseases of the mouth are found very easily. Consequence of deficient saliva production is higher infection rate and dental cavities due to lack of saliva cleaning function. Intrinsic buccal glands produce low levels of saliva production between meals in order to maintain moistness in the mouth. Dissolves food chemicals so can be tasted. Contains enzymes that begin digestion of starches. 3 pairs of extrinsic salivary glands and small intrinsic buccal glands.