BSCI 201 Chapter Notes -Pleural Cavity, Alveolar Pressure, Thoracic Cavity

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Gas exchange between the blood and external environment: occurs in the alveoli of the lungs. Passageways to the lungs purify, humidify and warm the incoming air. Upper airways: air passage of the head and neck. Respiratory tract: from the larynx throughout the lung: Conducting zone: conducts air from larynx through lungs. Respiratory zone: sit of gas exchange: respiratory bronchioles, alveolar ducts, alveolar sacs, alveoli. A lot of branching to increase the surface area so we reduce the resistance. Air passageway, 150ml volume = dead space volume. Ciliated cells move particles toward mouth to be expelled. Olfactory receptors are located in the mucosa on the superior surface. The rest of the cavity is lined with respiratory mucosa that. Too little moisture: needed in order to use the right amount of moisture. The nasal cavity is separated from the oral cavity by the palate. Sense of taste is usually pretty reliant off the sense of smell.

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