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Respiratory Physio

Respiratory Physiology

Respiration -Ventilation: Movement of air into and out of lungs -External respiration: Gas exchange between air in lungs and blood Transport of oxygen and carbon dioxide in the blood -Internal respiration: Gas exchange between the blood and tissues
Respiratory System Functions -- Olfaction: Smell occurs when airborne molecules drawn into nasal cavity Protection: Against microorganisms by preventing entry and removing them Gas exchange: Oxygen enters blood and carbon dioxide leaves Regulation of blood pH: Altered by changing blood carbon dioxide levels Voice production: Movement of air past vocal folds makes sound and speech
Respiratory System Divisions Upper tract-> -Nose, pharynx and associated structures Lower tract-> -Larynx, trachea, bronchi, lungs
Nasal Cavity Nose External nose --Nasal cavity ----Functions *Passageway for air *Cleans the air *Humidifies, warms air *Smell --Along with paranasal sinuses are resonating chambers for speech
Pharynx Pharynx --Common opening for digestive and respiratory systems Three regions= *Nasopharynx *Oropharynx *Laryngopharynx
Larynx Functions= ---Maintain an open passageway for air movement Epiglottis and vestibular folds prevent swallowed material from moving into larynx --Vocal folds are primary source of sound production
Vocal Folds Vocal folds  heavy band of connective tissue wrapped in epithelial cells Cartilage moved in and out by muscles in the throat Air can move in and out easily without resistance When you push air through, vocal fold vibrate and sound is produced
Trachea Windpipe Divides to form Primary bronchi Carina: Cough reflex
Tracheobronchial Tree Conducting zone Trachea 2 terminal bronchioles which is ciliated 4 removal of debris Passageway 4 air movement Cartilage holds tube system open + smooth muscle controls tube diameter Respiratory zone Respiratory bronchioles to alveoli Site 4 gasxchg
Created by: zeenat on 2008-03-05

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