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Breathing consists of two phases, inspiration and expiration. During inspiration, the diaphragm and the intercostal muscles contract. The diaphragm moves downwards increasing the volume of the thoracic (chest) cavity, and the intercostal muscles pull the ribs up expanding the rib cage and further increasing this volume.
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www.stemnet.nf.ca/~dpower/resp/exchange.htm
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Human Anatomy question: Difference between inspiration and expiration? This occurs within the respiratory system. During inpiration, the intercostal muscles ...
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wiki.answers.com/Q/Difference_between_inspiration_and_e...
wiki.answers.com/Q/Difference_between_inspiration_and_expiration
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Inspiration and active expiration are commonly viewed as antagonistic phases of a unitary oscillator that generates respiratory rhythm. ... We hypothesize that inspiration and expiration are generated by coupled, anatomically separate rhythm generators, one generating active expiration located close to the facial nucleus in...
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www.medscape.com/medline/abstract/16293645
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The Medscape Journal ... Allergy & Clinical Immunology ... Diabetes & Endocrinology...
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www.medscape.com/medline/abstract/5401752
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During inspiration, intrathoracic pressure is reduced, which will decrease venous return from the pulmonary circulation to the left atrium of the heart and decrease preload; heart rate will therefore increase slightly to compensate and maintain the same cardiac output. ... The opposite happens during expiration;
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answers.yahoo.com/question/index?qid=20090720212245AAP6...
answers.yahoo.com/question/index?qid=20090720212245AAP62hC
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1 Inspiration begins as... ... The result of the process of inspiration is... ... Home > Chapter 23 > Animation: Alveolar Pressure Changes During Inspiration and Expiration...
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highered.mcgraw-hill.com/sites/0072507470/student_view0...
highered.mcgraw-hill.com/sites/0072507470/student_view0/chapter23/animation__alveolar_pressure_changes_during_inspiration_and_expiration.html
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The first phase is the inspiration phase. Inspiration allows air to flow into the lungs. The second phase is expiration. Expiration involves gases leaving the lungs. During inspiration, the diaphragm and intercostal muscles During expiration, the inspiration muscles relax forcing gases to flow out of the lungs.
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www.umm.edu/imagepages/9026.htm
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The expiration-inspiration (E-I) ratio is used to assess the reflex increase in the heart rate that occurs at the end of inspiration and the reflex decrease in heart rate that follows at the end of expiration.
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www.medal.org/visitor/www%5CActive%5Cch7%5Cch7.02%5Cch7...
www.medal.org/visitor/www%5CActive%5Cch7%5Cch7.02%5Cch7.02.02.aspx
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Expiration: the reversal of inspiration: decrease volume of chest, expulsion of air ... Inspiration: diaphragm contracts and intercostal muscles contract causing thoracic cavity to enlarge lowering pressure in the lungs, pulling in air...
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student.ccbcmd.edu/~dhargrov/ppplc/BIOL107LC/respiratio...
student.ccbcmd.edu/~dhargrov/ppplc/BIOL107LC/respiration/tsld004.htm
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