Respiratory System

Respiratory System - * Receives olfactory stimulation *...

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Respiratory System Respiratory System Functions * Gas exchange * Smell * Filters inspired air * Sound production Respiration The exchange of gases between the atmosphere, blood and cells. * Involves three processes * Pulmonary ventilation - inspiration and expiration. * External repiration - the exchange of gas between the lungs and blood. * Internal respiration - the exchange of gases between the blood and cells. Structures of the Respiratory System Upper Respiratory System * Nose * Pharynx (throat) Lower Respiratory System * larynx (voice box) * Trachea (windpipe) * Bronchi * Lungs Structures of the Respiratory System Functionally, the respiratory system consist of two parts * Conducting portion- a series of interconnected tubes and cavities that conduct air to the lung. * Respiratory portion- where gas exchange occurs. Nose Function * Warms, moistens, and filters incoming air * nasal hairs * superior, middle, and inferior nasal conchae (turbinates)- lined with mucus membranes containing goblet cells and is vascular (moistens and traps particles).
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Unformatted text preview: * Receives olfactory stimulation * above the superior nasal conchae is the olfactory epithelium (olfactory bulb), which receives olfactory stimuli. * Provides a resonating chamber for speech sounds * ethmoid, maxillary, sphenoid, and frontal sinuses * Connects the eyes with the nose via the nasolacrimal duct. Sinusitis * Sinusitis starts as a result of blockage of the drainage pathway of the sinuses. This blockage can occur as a result of * an anatomical obstruction, Respiratory System * swelling due to a cold or allergy, * or chronic recurrent sinus infections. * When this occurs, mucus that normally is expelled from the sinus builds up in the sinus. * cause pressure or pain * mucus is an excellent culture medium for bacteria * If the mucus is not cleared immediately, a bacterial infection exists until the blockage is cleared and the sinuses drain normally again. Normal Sinus Drainage Block Sinus Drainage Resulting in Sinusitis...
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This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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Respiratory System - * Receives olfactory stimulation *...

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