Anatomy Exam 4 Notes - Exam 4 Functions of the Respiratory...

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Exam 4 Functions of the Respiratory System - gas exchange between air and blood - conduction of air within the lungs - protection of respiratory surf - phonation - production of audible noise - olfactory sensation Organization of the Respiratory System - upper respiratory system (nose, nasal cavity, paranasal sinuses, pharynx) and lower respiratory system (larynx, trachea, bronchi, bronchioles, alveoli) - conducting portion of the tract à moves air (nasal cavity to terminal bronchioles) - respiratory portion (respiratory bronchioles and alveoli) - Nares – openings to the nasal cavities - The nasal cavity opens posteriorly to the pharynx (region called – internal naris or choana) - Pharynx – 3 regions – nasopharynx, oropharynx and lorangopharynx - Lower respiratory starts at the voice box (larynx) trachea (windpipe)  2 bronchi smaller bronchi  bronchioles  alveoli - Tracheo-bronchiole tree - trachea branches to 2 bronchi  right branches to right primary bronchi  3 secondary bronchi (feeds 3 lobes of the right lung)  tertiary bronchi  broncho-pulmonary segment (terminal bronchiole + respiratory bronchiole + alveolar sacs) - Conducting portion – warm/humidify air ( when it meets cold, dry air . goblet cells secrete mucus ), conduct air and filters air
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