Page 226 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Blood flow to organs
15–25 L/min,
depending on fitness
Maximum Relative to
blood flow organ weight
6 L/min L/(min . kg organ)
Blood flow Relative to
at rest organ weight
5
Blood flow 4 Regulation of the Circulation I

3

2

1
Plate 8.14
Skeletal muscle Gastrointestinal Skin Liver (hepatic artery only) Brain Kidneys Cardiac muscle

tract

B. Vasoconstriction and vasodilatation
Pressor area 1a 1b
Neuronal Neuronal
Sympathetic Sympathetic
tonus tonus

Parasympathetic system
(salivary glands, genitalia)
Vessel stretch
P O 2
Myogenic reaction Adenosine, P CO 2 ,
H , K etc.
+
+
2a 2b
local P O 2 Constriction Dilatation NO local
Endothelin-1 (ET A ) PGE 2 , PGI 2
EDHF
PGF 2α ,
thromboxane Bradykinin,
kallidin
ADH (V 1 ), Epinephrine (β 2 ) Acetylcholine (M),
epinephrine, ATP,
angiotensin II 3a 3b histamine (H 1 ), 213
Hormonal Hormonal endothelin-1 (ET B )
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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