Figure 448 Page 865

1
Figure 44-8Page 865
Trachea
Lung
Diaphragm
Inhalation
Exhalation
Diaphragm
Forced inhalation
Forced exhalation
2
Figure 44-7aPage 864
Bronchiole
Capillary
Alveolus
Macrophage
Red blood cells
Capillaries
Alveolus
Alveolus
Epithelial cell of the adjacent alveolus
Alveolus
Alveolus
Epithelial cell of the wall of the alveolus
(contd next slide)
3
Figure 44-9Page 866
PO2 100 mm Hg
PCO2 40 mm Hg
Alveoli in lung
O2
CO2
Capillary in tissue
Capillary in lung
Cells in body
PO2 40 mm Hg
PCO2 46 mm Hg
4
Figure 44-10Page 867
Normal oxygenhemoglobin dissociation curve
Effect of pH
7.6
7.4
7.2
Oxygen-rich blood leaving the lungs
Percent O2 saturation
Percent O2 saturation
Oxygen-poor blood returning from tissues
Partial pressure of oxygen (mm Hg)
Partial pressure of oxygen (mm Hg)
5
Figure 44-11aPage 868
Tissue cell
CO2
Tissue capillary wall
Plasma
CO2
Red blood cell
CO2
CO2 H2O
CO2
Carbonic anhydrase
Hemoglobin
H2 CO3 Carbonic acid
H
Cl
HCO3 H Bicarbonate
Chloride shift
HCO3 Bicarbonate
Cl
6
Figure 44-11bPage 868
HCO3 Bicarbonate
Cl
Chloride shift
HCO3 H Bicarbonate
H
Cl
H2CO3 Carbonic acid
H
Hemoglobin
CO2
CO2 H2O
H2O
CO2
Pulmonary capillary wall
CO2
CO2
Alveoli