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Title:

THE RESPIRATORY SYSTEM

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THE RESPIRATORY SYSTEM VENTILATION & RESPIRATION VENTILATION Ventilation = Breathing NO gas exchange VENTILATION VISUALS VENTILATION VISUALS Lung Volume ... – PowerPoint PPT presentation

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Title: THE RESPIRATORY SYSTEM


1
THE RESPIRATORY SYSTEM
  • VENTILATION RESPIRATION

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

3
VENTILATION VISUALS
Be sure to look at these sites copy paste the
URLs
http//oac.med.jhmi.edu/res_phys/Encyclopedia/Alve
olarPressure/AlveolarPressure.HTML http//www.mhhe
.com/biosci/genbio/animation_quizzes/animate_11.ht
m
4
VENTILATION VISUALS
Be sure to look at these sites type in the URLs
http//oac.med.jhmi.edu/res_phys/Encyclopedia/Alve
olarPressure/AlveolarPressure.HTML http//www.mhhe
.com/biosci/genbio/animation_quizzes/animate_11.ht
m
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
  1. Cellular cells use O2 to burn food (glucose)
    produce CO2 as waste

Copy Paste this URL!
http//www.mhhe.com/biosci/genbio/animation_quizze
s/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
  1. Dissolved in the plasma 7
  1. Directly bound to Hb 23
  1. 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.
gt90 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
  • ? gt 2 billion infected becoming resistant to
    meds!
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