Physiology 2130 Lecture Notes - Lecture 2: Medulla Oblongata, Hemoglobin, Starch
23 Aug 2016
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Document Summary
Digestive system anatomy and function describe the four processes of the digestive system: secretion exocrine into lumen of digestive tract endocrine into blood stream, digestion chemical (enzymes) Mechanical: motility propels food through each segment of the tract can participate in mechanical digestion, absorption. Movement of macronutrients into cells of the digestive tract and then into the blood label the anatomy of the gastrointestinal tract. *accessory organs: not part of the digestive tract but have a role in digestive activities, salivary glands (saliva), liver (bile), gall bladder (stores/secretes bile), pancreas label the anatomy of the upper gastrointestinal tract. Upper gastrointestinal tract: begins the digestion of food, no macronutrient absorption, both mechanical and chemical digestion. Digests carbohydrates: in babies also some lingual lipase. Digests fat, but doesn"t actually begin until the stomach vast majority of saliva is secreted by 3 exocrine glands and each secretes a different composition of fluid and is most active during certain times: parotid gland.
