Respiratory systemHongyaSunYangzhou University
Respiratory system Hongya Sun Yangzhou University 1
OBJECTIVESThis chapter should help you to:Know the structure and function of olfactory epitheliumMasterthestructuralfeaturesoftracheaandtheirrelationtofunction.Masterthekeydistinguishingfeaturesof thevarioussegments ofpulmonary conductingportionMasterthe composition and structureof pulmonaryrespiratoryportion.MasterthestructureandfunctionofalveolusMasterthecomponentsofblood-airandthefunctionoflungmacrophages
2 OBJECTIVES This chapter should help you to: l Know the structure and function of olfactory epithelium l Master the structural features of trachea and their relation to function. l Master the key distinguishing features of the various segments of pulmonary conducting portion. l Master the composition and structure of pulmonary respiratory portion. l Master the structure and function of alveolus. l Master the components of blood-air and the function of lung macrophages
I.General descriptionA.Components-nasalcavity,pharynx,larynx--tracheaCounducting--primary bronchiportionbronchi of various sizesbronchiolesterminalbronchioles--lungrespiratorybronchiolesRespiratoryalveolarductsalveolarsacsportionalveoli
Ⅰ.General description A. Components -nasal cavity, pharynx, larynx -trachea -primary bronchi -lung respiratory bronchioles alveolar ducts alveolar sacs alveoli bronchi of various sizes Counducting portion Respiratory portion bronchioles terminal bronchioles 3
TracheaPrimarybronchusOlfactorySecondarybronchiepitheliumNasal cavityNasopharynxOropharynxRight lungLeft lungConductingportionLarynxBronchiole(1mmorlessin.diameter)TracheaTerminalbronchioleBronchiolesRespiratorybronchioleRespiratory-BronchtbronchiolesLungZAlveolarduct心RespiratoryAlveolarductsportionTerminal.-alveoliAlveolarsacDiaphragm(terminationofalveolarduct)
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B. function1.Counductingportion-toprovide a conduitthrough whichair cantraveltoand fromthe lungs and conditiontheinspired air--to ensure an uninterrupted supply of air--to clean,moisten,and warm the inspired air--others: voice, olfaction , etc2.Respiratoryportion-exchageofgasestakesplace
B. function 1.Counducting portion -to provide a conduit through which air can travel to and from the lungs and condition the inspired air -to ensure an uninterrupted supply of air -to clean,moisten,and warm the inspired air -others: voice, olfaction , etc. 2.Respiratory portion -exchage of gases takes place 5