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Download BREATHING: the diaphragm and how it gets there
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The Passage to the Lungs and the Diaphragm By Sarah Blenko, Becki Kennedy, and Michael Singleton The Passageway to the Lungs • Starts off in mouth/nose • Goes through pharynx • Passes by epiglottis • Goes down trachea • Goes by the larynx • Passes into lungs The Hogwarts Express Analogy • Wizards = Air • Muggles = Food • Platform 9 3/4 = Epiglottis • Hogwarts Express = Trachea • Hogwarts = Lungs The Diaphragm: What is it? A sheet of muscle between the chest and abdominal cavities What does it do? • Original shape is curved up • When it contracts, it moves downwards (inhalation) • Lessens the pressure in chest cavity • More air space in thorax • When it relaxes, it moves upwards (exhalation) • Increases pressure in chest cavity • Less air space in thorax How does the diaphragm connect to Respiration? • With contraction of diaphragm, more space and less pressure in lungs allows for intake of oxygen in order to breathe • With relaxation of diaphragm, carbon dioxide is expelled from the lungs and body as pressure rises in lungs and carbon dioxide is pushed out References Dowshen, Steve. "Lungs and Respiratory System." KidsHealth. Apr. 2007. 28 Oct. 2008 <http://kidshealth.org/teen/your_body/body_basics/lungs.html>. "Human Physiology- Respiration." 28 Oct. 2008 <http://people.eku.edu/ritchisong/RITCHISO//301notes6.htm>. "Your Lungs: Human Respiratory System." American Lung Association. 2008. American Lung Association. 28 Oct. 2008 <http://www.lungusa.org/site/pp.asp?c=dvLUK9O0E&b=22576>.
