MEDT220 Lecture Notes - Lecture 12: Mycobacterium Tuberculosis, Tuberculin, Mechanical Ventilation

• School: University of Delaware
• Department: Medical Laboratory Sciences
• Course: MEDT220
• Professor: kimberlyarnold

Document Summary

Chapter 12 respiratory system: movement of oxygen from the outside air to the cells within tissues and transport of carbon dioxide in the opposite direction. Two processes: external respiration, internal respiration. Nose: --air enters body through two openings = nostrils/nares. Nasal cavity: --lined with mucous membranes to warm and moisten air, --lined with cilia to filter out foreign bodies. Epiglottis: --flap of cartilage attached to the root of the tongue prevents choking or aspiration of food, --lid over the opening of the larynx, --during swallowing, closes over larynx to prevent material from entering lungs. Oropharynx: --closer to mouth, --contains palatine tonsils. Larynx: --contains vocal cords, --surrounded by several pieces of cartilage for support and keeps airway open, --protects against inhaled or swallowed substances. Laryngopharynx: --common passageway for food from the mouth and air form the nose. Nasopharynx: --contains pharyngeal tonsils (adenoids, --if enlarged can obstruct airways.