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Lecture

Respiratory System Notes.docx

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Department
Communication
Course
COMM 1020
Professor
Dibenedetto
Semester
Fall

Description
Respiratory System Lung Tissue functions- gas exchange,ACE portion of RAAS system, blood reservoir for left ventricle, free macrophages remove clots, heparin producing cells Basic anatomy: Larynx > Trachea> Primary Bronchi> Secondary Bronchi > Bronchioles > Terminal Bronchioles> (Respiratory bronchioles >Alveolar Ducts > Alveolar Sacs) Respiratory membrane: key to ‘easy’gas exchange, very thin allos for gasses and nutrients to diffuse easily Alveolar cell types: 1 FormAlveolar wall , 2 Secrete Surfactant Alveolar macrophages: Both Fixed and Roaming Pulmonary ventilation: Inhalation / exhalation External respiration: alveoli to capilary Internal respiration: capillary to tissue · Ventilation: Diaphragm contracts increasing size of thoracic cavity (decreases internal pressure). Relaxing muscles increases pressure surfactant/La Place’s Law: Surfactant prevents collapse of alveoli, more pressure in smaller alveoli so surfactant equalizes pressure Boyle’s Law: smaller volume = more pressure Dalton’s Law: partial pressures factors effecting ventilation: pressures, compliance, resistance, surface tension in alveoli Ventilation/Perfusion Coupling: If there is excessive perfusion (release of CO2 into alveoli) there is reduced O2 and arterioles constri
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