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Ch 37 Gas Exchange

Ch 37 Gas Exchange. AP lecture. Background information. Diffusion Barometric pressure Oxygen in the air. Mammal. Oral cavity and nasal passage Pharynx Larynx Trachea Bronchi Bronchioles Alveoli. Inhalation and exhalation. Thoracic cavity houses lungs and diaphragm.

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Ch 37 Gas Exchange

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  1. Ch 37 Gas Exchange AP lecture

  2. Background information • Diffusion • Barometric pressure • Oxygen in the air

  3. Mammal • Oral cavity and nasal passage • Pharynx • Larynx • Trachea • Bronchi • Bronchioles • Alveoli

  4. Inhalation and exhalation • Thoracic cavity houses lungs and diaphragm

  5. http://teachhealthk-12.uthscsa.edu/studentresources/anatomyofbreathing3.swfhttp://teachhealthk-12.uthscsa.edu/studentresources/anatomyofbreathing3.swf

  6. Negative feedback • Breathing is an involuntary function of the CNS ; specifically medulla oblongata • Rate is regulated by carbon dioxide • Major site medulla oblongata • Carbon dioxide indirectly controls breathing via changes in pH levels

  7. O2 O2 O2 O2 CO2 CO2 CO2 CO2 Diffusion of gases • Concentration gradient & pressure drives movement of gases into & out of blood at both lungs & body tissue capillaries in lungs capillaries in muscle blood lungs blood body

  8. Transporting gases • Oxygen carried by hemoglobin, protein in red blood cells • Each hemoglobin can bind four oxygen molecules

  9. http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter25/animation__gas_exchange_during_respiration.htmlhttp://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter25/animation__gas_exchange_during_respiration.html

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