Module 3.5Notes - Module 3.5: Ventilation & Respiration...

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Module 3.5: Ventilation & Respiration Functions of Respiratory System – provides a means of oxygen and carbon dioxide exchange between environment and body, works with circulatory system, if fail death occurs 4 mins is brain damage and after 10 brain damage is irreversible, regulaton of blood ph(modulates circulating levels of co2), sound production air past vocal folds makes sound and speech, olfaction- smell occurs when airborne molecules are drawn into nasal cavity. Thermoregulation- heating and cooling of body, protection filtered inspired air to protect against microorganisms. Respiratory Cycle – 3 stages. 1= pulmonary ventilation, the exchange of gases between lungs and external environment. 2= external respiration, the exchange of gases between the lungs and bloodstream 3= internal respiration, the exchange of gases between the blood stream and bodily tisues Anatomy of the Respiratory System - The conduction_Zone consisting of all the respiratory passageways The respiratory Zone where gases are exchanged. Nasal Cavity =Provides an airway for respiration,warms and moistens air.,Filters and cleans inspired air.Houses olfactory receptors. Resonating chamber for speech. Pharynx= Common passageway for both air and food. , Commonly referred to as the throat. Larynx= Complex structure formed by many independent cartilage structures. -Nine c-rings of cartilage form the framework of the larynx. -Circoid cartilage forms the lowest portion of the larynx. -Routes air and food into proper passageways. -Used in voice production. Trachea - Flexible tube also referred to as the ‘windpipe’. - Formed by C-shaped tracheal cartilages which reinforce and provide rigidity to ensure the trache remains open. - Conduit for air entry into the lungs. - Carina marks where the trachea divides.
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Epiglotis -Routes air and food into proper passageways. - Rotates during swallowing Bronchi - A highly branched system of air- conducting passages which are mucus lined for removal of debris. - Cartilage holds tube system open and smooth muscle controls tube diameter - Right primary bronchus is shorter and wider than the left primary bronchus. Foreign particles are more likely to lodge in the right primary bronchus. Lungs Paired, cone-shaped organs divided into lobes. Left Lung is divided by the oblique fissure into 2 lobes. Look up!!!! Cardiac notch accommodates the heart. Right Lung is divided by oblique and horizontal fissures into 3 lobes. Located more superiorly in the body due to the liver. Pleura Lungs are enclosed by membranes called pleura. The outer surface of each lung is tightly covered by the visceral pleura . The thoracic wall and diaphragm are covered by the parietal pleura . The pleural membranes produce
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This note was uploaded on 01/12/2012 for the course KIN 173 taught by Professor Staff during the Fall '11 term at Michigan State University.

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Module 3.5Notes - Module 3.5: Ventilation & Respiration...

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