BIOL-3150 Chapter Notes - Chapter 26: Intrinsic Factor, Sphincter, Bicarbonate
23 Jan 2018
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Initial site of mechanical and chemical digestion: lined by nonkeratinized stratified squamous epithelium, protects against abrasive events, kept moist by secretions of salivary glands. Salivary glands: accessory digestive organs, extrinsic glands: parotid, submandibular & sublingual glands, produce the majority of the saliva, intrinsic glands: buccal glands, secrete lingual amylase: enzyme activated by low ph levels in the stomach to break down lipids. Inferior es is not very strong sphincter, thin band: find that inferior es is not strong enough to keep stomach content from coming back into this area ; acid reflux, muscles of diaphragm is what prevents regurgitation! Small intestine: pyloric sphincter to the iliosecal valve, secum of large intestine, duodenumjejunal flexture is the point at which the duodenum and jejunum break off into separate entities, demarcation. Liver: regulatory organ for many metabolic processes and processing of nutrients, produces bile: emulsifies fat, not an enzyme, increases sa and lipase is able to break it down more easily.
