NUR 306 Lecture Notes - Lecture 3: Scapula, Asthma, Fremitus
Document Summary
Left lung: is narrower and has 2 lobes. Nasal cavity warms air, humidifies it and filters the air. Alveolar ducts and sacs: are the functional units for gas exchange (alveoli are the most effected by smoking) Pleura: serous protective lining of the lungs, helps reduce frictions and maintain negative pressure (produces lung sounds) Trachea: airway between the larynx and bronchi (size of a hot dog in children) Bronchi: airway between the primary, secondary and tertiary branches (have deeper sounds) Blood can become more alkaline or acidic (acidosis and alkalosis) Diaphragm is the primary muscle for breathing (chest and abdomen) If in respiratory distress the accessory muscles are used. Medulla contains the motor neurons and the phrenic nerve innervates the diaphragm. Conical shape- marrow at top and wide at the bottom. Landmarks of the respiratory system suprasternal notch, sternum, manubrium, body, xiphoid process, costal angle costal angle should be less than 90 degrees in an healthy person.
