Transcript BREATHING: the diaphragm and how it gets there

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>.