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chapt22 v0805 Respiratory

chapt22 v0805 Respiratory - Chapter 22 Respiratory System 1...

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1 Chapter 22 Respiratory System
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2 Tale of Two Gases RESPIRATION is Simple- in with the good (O2), out with the bad (CO2) called Pulmonary ventilation Phases of respiration: External respiration- gases exchanged between lungs and blood Internal respiration-gases exchanged between blood and tissues
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3 Respiratory System Anatomy- Upper Respiratory System: Nose, Pharyn x , Laryn x (“X” marks the spot) Lower Respiratory System: T rachea, B ronchi, Lungs ( TB of the lungs)
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4 Nose The study of the nose, ears and throat is called otorhinolaryngology (oto= ear, rhino= nose, larynx= throat) External nose: Cartilage stuck to the nasal bones creating a wind tunnel with two holes called the external nares or nostrils Function : f iltering air o dors detection r esonating chamber that amplifies the voice (hold your nose) m oisture addition w arming air FOR M en and W omen
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5 Anatomy of Nasal Region Note the philtrum
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6 Anatomy of Nasal Region Where does the nasal bone end in the nose?
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7 The Deep Dark Secret of the Schnoz Internal nose anatomy- nasal cavity divided by nasal septum Nasal septum anatomy - consists of the perpendicular plate of the ethmoid bone (superior), the vomer (inferior) and septial cartilage (anterior) Deviated nasal septum= is a disorder of these nasal septum
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8 The Nasal Septum
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9 The Path of Air in the Snoot Air enters the nostrils first, Then the vestibule (anterior nasal cavity), Nasal Conchae create the meatuses, The superior, middle and inferior nasal conchae extend from the lateral nose wall creating shelves in the nose Between these shelves are spaces called the superior, middle, and inferior meatuses Then air goes to the olfactory epithelium, CN I meets the air, pseudostratified ciliated epithelium with goblet cells are here moistening the air and trapping dust And then into the Pharynx on the way to the lungs
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10 Nasal Cavity - Mucosa Olfactory mucosa lines roof of nasal cavity Respiratory mucosa lines rest of nasal cavity with ciliated pseudostratified epithelium Defensive role of mucosa mucus (from goblet cells) traps inhaled particles bacteria destroyed by lysozyme Alternate nasal breathing, right side is +, left is - ions
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11 Regions of Pharynx The Pharynx (FAIR-inks)- from the internal nose to the cricoid cartilage Naso- Oro- Laryngo- C 5
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12 Pharynx Function: passage way for food, air, water resonating chamber immune function, tonsils Superior portion has an opening for the Eustachian tube Inferior portion connects to the esophagus and the larynx (food and air tubes)
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