Respiratory System 2 19 2020 1 The respiratory system a Major functions iii iv Speech Regulate pH b Respiratory system Supply body with O2 and dispose of CO2 Olfaction 1 Only sense that can go straight to the brain nose Pulmonary ventilation breathing movement of air into and out of the lungs External respiration exchange of O2 and CO2 between lungs and blood c Circulatory system Transport of O2 and CO2 in blood Internal respiration exchange of O2 and CO2 between systemic blood vessels and tissues d Synergistic working with or the interaction of cooperation between two or i ii i ii i ii i more systems 2 The major respiratory organs a Upper respiratory system Nose 1 2 Nasal Cavity External nose a Septum b Palate i ii Hard Soft uvula c Conchae turbinates d Meatuses Filter air i ii Warm moisten incoming air iii Reclaim heat and moisture during expiration Paranasal sinuses Pharynx b Lower respiratory system Larynx Trachea Bronchial tree Alveoli Lungs Pleurae c Divided into 2 zones Conducting zone ii iii i ii iii iv v vi i 1 2 Conduits tubes that transport gases to the respiratory zones Includes the nose pharynx larynx trachea bronchi bronchioles and terminal bronchioles 3 macroscopic ii Respiratory zone 1 Site of gas exchange 2 Microscopic cellular level of gas exchange
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