Page 148 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Snorkeling B. Diving with equipment
Normal Too deep Gas embolism

<40cm N 2
Excessive dead space or resistance Blood N 2 bubbles Baro-

trauma
too rapidly
Depth N 2 Resurfacing Effects of Diving on Respiration
>100cm Anoxia

Water pressure Depth
prevents inhalation ca.70 m
Plate 5.15

C. Diving unassisted
0
Depth
(m)
(Water pressure 10
98kPa 0 20 40 Diving time (s)
at depth of 10m)
Alveolar partial pressures Signal to resurface
19.3
Hyper- (kPa)
ventilation P O 2
15 6.6 6.6
(kPa) 148
P CO 2 Too late!
13.3
5.2
3.5
4.2
Anoxia
(kPa)
P N 2
76.5 76.5 76.5
0.0
Alveolar gas exchange Water pressure
Lung

O 2 O 2
O 2 N 2
CO 2
N 2
N 2
Blood
CO 2 CO 2 135
(after Hong et al.)
Despopoulos, Color Atlas of Physiology © 2003 Thieme
All rights reserved. Usage subject to terms and conditions of license.