CHAPTER_16_RESPIRATORY_SYSTEM_Notes

CHAPTER_16_RESPIRATORY_SYSTEM_Notes - CHAPTER 16...

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CHAPTER 16 RESPIRATORY SYSTEM System Brief Respiration exchange of gases between living cells in the environment Pulmonary ventilation: breathing movement of air into and out of lungs Gas exchange: diffusion of oxygen and carbon dioxide between blood and lungs diffusion of oxygen and carbon dioxide between blood and cells Gas pickup and transport: transport of oxygen and carbon dioxide in the blood Structures: Organs of the Respiratory System The respiratory system consists of the upper respiratory tract above vocal cords Nose, nasal cavity, paranasal sinuses, pharynx and the lower respiratory tract below vocal cords Larynx, trachea, bronchi, bronchioles, alveoli The nose and nasal cavity consists of: External nares Nasal cavity Vestibule Superior, middle and inferior nasal conchae Hard and soft palates Nasal mucosa The Respiratory Epithelium of the Nasal Cavity and Conducting System Pharynx: Three Divisions of the Throat Nasopharynx passage for air only. Oropharynx Laryngopharynx passageways for both air and food. Larynx: The Voicebox 1. The larynx conducts air between the pharynx and the trachea, prevents foreign objects from entering the trachea, and produces sound. Larynx: The Voicebox 2. Composed of muscle and cartilage, the larynx is lined with mucous membrane. The thyroid cartilage (Adam’s apple) is the largest and most anterior cartilage of the larynx. Larynx: The Voicebox
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3. The epiglottis is the uppermost cartilage. It covers the larynx during swallowing. Larynx: The Voicebox
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CHAPTER_16_RESPIRATORY_SYSTEM_Notes - CHAPTER 16...

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