ANAT 216 Lecture Notes - Lecture 11: Palatine Tonsil, Soft Palate, Taste Bud

• School: Queen's University
• Department: Anatomy and Cell Biology
• Course: ANAT 216
• Professor: Leslie W Mac Kenzie

Document Summary

Digestive system: lecture 1 (reading material: chapter 18: pages 477-478; chapter 25: pages 658-660; 664-668) Components of the digestive system small intestine, large intestine, anus: digestive tract (alimentary canal): mouth, oral cavity, pharynx, esophagus, stomach, accessory digestive organs: teeth, tongue, salivary glands, liver, biliary ducts and gall bladder, pancreas. Oral cavity (buccal cavity; "mouth"): buccal" = cheeks. Between the two folds is the palatine tonsil (the one that gets removed: anterior (palatoglossal) arch, posterior (palatopharyngeal) arch, palatine tonsil: between the two folds/arches, tongue: sits on floor or oral cavity. Function: to manipulate food, to push it back the nasopharynx. Contains lots of taste buds: frenulum: connected to the floor of the oral cavity (lingual frenulum, muscles: bag of muscle; two groups; all innervated by the hypoglossal nerve. When unconscious and lying down, to prevent swallowing tongue obstructing pharynx, jaw thrust to thrust mandible forward. Right genioglossus moves tongue to left, vice versa, medial sticking out requires both.