Health Sciences 3300A/B Lecture Notes - Lecture 3: Gastrointestinal Tract, Salivary Gland, Small Intestine
2 Apr 2018
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Document Summary
Tongue - manipulates food: salivary glands - secret things into oral cavity so environment is right to digest food. Liver: gallbladder, pancreas, accessory digestive organs - crucial so digestive system can do job. Entry to gi tract and oral cavity: propulsion, peristalsis (movement of food through digestive tract) vs. segmentation (breaking food up , moving things forward and things don"t stay still, muscular movement, mechanical digestion, chewing and churning, chemical digestion. Ingestion: mastication - chewing, deglutition - swallowing, mucosa - lined cavity, borders - exible, cheeks (lateral borders) - buccinator muscle that maintains pressure in real cavity, controls cheeks to either loosen them or increase volume or oral cavity. Lips (anterior border) - chewing and keeping things inside oral cavity: palate (superior border) - hard and soft that line roof of oral cavity. Tongue (inferior border) - huge structure where we have alot of control over: when lips open up (anterior opening) is oral ori ce, continuous with oropharynx.
