1 / 16

THE RESPIRATORY SYSTEM

THE RESPIRATORY SYSTEM. VENTILATION & RESPIRATION. VENTILATION. Ventilation = Breathing – NO gas exchange. Inspiration & Expiration Steps. Diaphragm contracts & lowers. Intercostals contract & lift ribs. Lungs expand. Increased volume in lungs = decreased pressure in lungs.

gaius
Download Presentation

THE RESPIRATORY SYSTEM

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. THE RESPIRATORY SYSTEM VENTILATION & RESPIRATION

  2. VENTILATION • Ventilation = Breathing – NO gas exchange • Inspiration & Expiration Steps • Diaphragm contracts & lowers • Intercostals contract & lift ribs • Lungs expand • Increased volume in lungs = decreased pressure in lungs • Air moves in (high to low pressure) • Expiration = opposite!

  3. VENTILATION VISUALS Be sure to look at these sites: copy & paste the URL’s http://oac.med.jhmi.edu/res_phys/Encyclopedia/AlveolarPressure/AlveolarPressure.HTML http://www.mhhe.com/biosci/genbio/animation_quizzes/animate_11.htm

  4. VENTILATION VISUALS Be sure to look at these sites: type in the URL’s http://oac.med.jhmi.edu/res_phys/Encyclopedia/AlveolarPressure/AlveolarPressure.HTML http://www.mhhe.com/biosci/genbio/animation_quizzes/animate_11.htm

  5. Lung Volume & Capacities Assignment • Use text pg 497 • Label all terms on chart (you can use letters) • BRIEFLY define all terms in space around chart • Define “Dead Space” ☆ This will be graded next class with an open-note quiz - you will not turn it in!

  6. RESPIRATION • Respiration = actual exchange of gases • Types: • External = diffusion of O2 CO2 between alveoli blood • Internal = diffusion of O2 CO2 between blood cells • Cellular = cells use O2 to burn food (glucose) & produce CO2 as waste Copy & Paste this URL! http://www.mhhe.com/biosci/genbio/animation_quizzes/animate_96.htm

  7. RESPIRATION WRAP-UP

  8. TRANSPORTATION OF GASES: Oxygen • 98% of O2 in blood is bound to Hemoglobin (Hb) Hb + O2 HbO2 • How tight the Hb holds on to O2 depends on: • pH • Temperature • Amount of CO2 & O2 present • Ex: In muscles at exercise

  9. TRANSPORTATION OF GASES: Carbon Dioxide • Can be transported 1 of 3 ways: • Dissolved in the plasma – 7% • Directly bound to Hb – 23% • Converted to carbonic acid & then bicarbonate ion on the RBC – 70% • CO2 + H20  H2CO3 HCO3- +H+ ☆ Respiratory Rates are VERY susceptible to levels of CO2 in the blood: too high = too acidic – body response = increased breathing

  10. RESPIRATORY DISORDERS VOCABULARY • Apnea = absence of breathing • Dyspnea = difficulty breathing • Hypoxia = decreased O2 to cells ☆ Lung Cancer = #1 cause of cancer death in U.S. & >90% of all cases are b/c of smoking!

  11. RESPIRATORY DISORDERS • Emphysema – degeneration of alveolar walls (permanent) Normal Alveoli

  12. RESPIRATORY DISORDERS • Asthma – spasm of bronchioles

  13. RESPIRATORY DISORDERS • Pneumonia – viral/bacterial infection of alveoli walls

  14. RESPIRATORY DISORDERS • Pulmonary edema – fluid in alveoli - usually from another condition (like a failing heart!)

  15. RESPIRATORY DISORDERS • Cystic Fibrosis – genetic disorder fills lungs with mucus – death by age 30 usually!

  16. RESPIRATORY DISORDERS • Tuberculosis(TB) – bacterial infection- scarring of lungs/death ☆ #1 infectious disease killer in world ☆ > 2 billion infected & becoming resistant to meds!

More Related