2016 bs respiratory system notes - weebly
TRANSCRIPT
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RESPIRATORY SYSTEM
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Function:
◦BRINGS IN OXYGEN NEEDED FOR CELLULAR RESPIRATION AND REMOVES EXCESS CARBON DIOXIDE FROM THE BODY
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Main Organs:◦NOSE filters and breathes in air ◦PHARYNX (throat)◦ LARYNX (voice box) ◦TRACHEA- guides air to lungs ◦LUNGS
◦BRONCHI - extension of trachea, splits to divide up air among lungs ◦BRONCHIOLES - guide air to alveoli ◦ALVEOLI - location of gas exchange
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Emphysema ◦Caused by smoking◦Gradual destruction alveoli◦What would be the effect of destroying alveoli?
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Asthma
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◦ http://www.nytimes.com/2015/04/07/science/behind-each-breath-an-underappreciated-muscle-the-diaphragm.html
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Gas Exchange in Plants
◦ Stomata: Pores in epidermis of leaves that can open and close to control the movement of CO2 in and O2 out (as a result of photosynthesis).
•All living organisms MUST do gas exchange – one of the requiresments for life.