respiratory system

respiratory system respiratory system chapter 43 respiration process of air exchange oxygen is obtained and carbon dioxide is eliminated gas exchange occurs in the alveoli four parts of respiration ventilation – movement of air between the atmosphere and alveoli perfusion – blood flow through the lungs diffusion – oxygen and carbon dioxide are transferred between alveoli and blood regulation – respiratory muscles and nervous system respiratory tract nose, pharynx, larynx, trachea, bronchi series of tubes that function as airway passages filter, warm and humidify incoming air pharynx contain the tonsils – normal function is to fight infection larynx – voice box epiglottis flexible cartilage – supported flap that covers the opening of the trachea or (glottis). it automatically closes the …

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