Unit 8-Lecture 1.ppt - Lecture 1-Structure of the...

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Lecture 1-Structure of the Respiratory System
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To obtain O 2 from the environment and deliver it to body cells for aerobic respiration To dispose of CO 2 , a key by-product of cellular respiration Help regulate body pH For olfaction For sound production
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To supply the body with oxygen and dispose of carbon dioxide Respiration – four distinct processes must happen Pulmonary ventilation – moving air into and out of the lungs External respiration – gas exchange between the lungs and the blood
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Transport – transport of oxygen and carbon dioxide between the lungs and tissues Internal respiration – gas exchange between systemic blood vessels and tissues
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The Nose Functions to produce mucus; filters, warms and moistens incoming air; resonance chamber for speech The nose includes a jutting external portion supported by cartilage and bone; and internal nasal cavity divided down the midline by the nasal septum and lined with mucosa
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Figure 22.2b
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7 Large chamber within the skull
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