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Respiratory System

Learn about the vital role of the respiratory system in providing oxygen, removing carbon dioxide, and generating energy through ATP. Discover how the lungs facilitate gas exchange, the process of breathing, and the automatic control of respiration by the brain. Dive into the significance of homeostasis, the impact of exercise on breathing, and the challenges posed by diseases affecting the respiratory system.

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Respiratory System

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  1. Respiratory System

  2. food O2 ATP CO2 Why do we need a respiratory system? • _____________________ • ___________________ • ______________ • _____________________ • ___________________

  3. _________________ _________________ Lungs • ______________ • ______________ • ______________ • ______________ ________

  4. Lungs • Structure spongy texture • high surface area • more absorption of O2 • ______________ • small air sacs • moist lining • mucus traps dust, pollen, particles • covered by cilia • hair-like extensions of cells • move mucus upward to clear out lungs

  5. Moving gases into bloodstream • Inhale • ____________________________ • ______________ • Exhale • ____________________________ • ______________ _________________ _________________

  6. O2 O2 O2 O2 CO2 CO2 CO2 CO2 Gas exchange: Diffusion of gases • Gases move by diffusion from high to low concentration • capillaries are thin-walled tubes of circulatory system • alveoli are thin-walled sacs of respiratory system capillaries in lungs capillaries in muscle blood lungs blood body

  7. Negative pressure breathing • ___________________moves down & expands chest cavity pulls air into lungs inhale exhale

  8. Automatic Brain Control • You don’t have to think to breathe! • ________________________________________________ • medulla & pons • measure blood pH • CO2 = pH (acid) • coordinate breathing, heart rate & body’s need for energy

  9. ATP CO2 O2 Breathing and Homeostasis • Homeostasis • keeping the internal environment of the body balanced • ___________________________________ • ___________________________________ • Exercise • __________________________ • need more ATP • bring in more O2 & remove more CO2 • Disease • ___________________________________ • need to work harder to bring in O2 & remove CO2

  10. Gills: getting O2 out of water • Gills are gas exchange membranes outside of the body • thin tissue • high surface area • must stay wet • lots of blood vessels • __________________ • ___________________ • ___________________ water gills Just keepswimming…

  11. You can breathe now, and… Ask Questions!!

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