Page 178 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Countercurrent systems
Water Reabsorption, Concentration of Urine I
0° 100° 0° 10°

20° 30°

Exchange of heat 50° 60°

70° 80°

50° 50° 90° 100°
1 Simple exchange system 2 Countercurrent exchange
Heat H 2 O
37° 35° 600
600 600 600
27° 25°
600 800
17° 15° 800 800 800 Plate 7.9
800 1000
7° 5° 1000 1000 1000
1000
2° 0° 1200
0° mosm/kgH 2 O
1200
Eis Eis
3 Countercurrent exchange (heat) 4 Countercurrent exchange (water)
in loop in loop (e.g. vasa recta)
Watertight
H 2 O
Cortex
400 400 400 200 400
NaCl NaCl
600 600 600 400 600
NaCl NaCl
Medulla
800 800 800 600 800
NaCl NaCl
1000 1000 1000 800 1000
1200 Vasa
recta
1200
Collecting duct
Henle’s loop
5 Countercurrent multiplier 165
(Henle’s loop) 6 Countercurrent systems in renal medulla
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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