Respiratory_system

Respiratory_system - RESPIRATORY SYSTEM COMPONENTS OF...

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RESPIRATORY SYSTEM
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COMPONENTS OF RESPIRATORY SYSTEM Nose - warms, cleanses & moisturizes inhaled air Pharynx Larynx (voice box) Trachea Bronchi Lungs - contain alveoli for gaseous exchange
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Respiratory System
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Anatomy of Nasal Region
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NASAL CAVITY Extends from nostrils to choanae (posterior nares) Divided into right and left chambers (nasal fossae) by nasal septum Ethmoid and sphenoid bones form the roof Palate forms the floor Vestibule: dilated chamber inside ala nasi - lined with stratified squamous epithelium & has vibrissae (guard hairs)
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CONCHAE & MEATUSES OF NASAL CAVITY Superior, middle and inferior nasal conchae Mucous membranes supported by thin turbinate bones on lateral walls of nasal fossa Meatuses Narrow air passages beneath each concha Ensure that air contacts mucous membranes
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MUCOSA OF NASAL CAVITY Olfactory mucosa lines roof of nasal fossa Respiratory mucosa lines the rest of nasal cavity with ciliated pseudostratified columnar epithelium Mucus (from goblet cells) trap inhaled particles then lysozyme destroys bacteria (defense)
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CILIA & ERECTILE TISSUE OF NASAL CAVITY Cilia of respiratory epithelium waft debris-laden mucus into pharynx to be swallowed Erectile tissue of inferior concha rhythmically engorges with blood and shifts flow of air from one side of nasal fossa to the other (prevents drying)
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LARYNX Glottis - superior opening Epiglottis - flap of tissue that guards glottis, directs food and drink to esophagus (prevents) Vocal cords - produce sound
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Respiratory_system - RESPIRATORY SYSTEM COMPONENTS OF...

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