Page 234 - Color_Atlas_of_Physiology_5th_Ed._-_A._Despopoulos_2003

A. Fetal circulation
Upper body
O 2
0.37
O 2 saturation Lungs
(fully saturated=1.0) 78 (not yet
(mL/min) 156 expanded)
Approx. blood 13
flow/kg 0.16
body weight
78 Ductus arteriosus Pulmonary Fetal and Neonatal Circulation
Pulmonary artery
Foramen vein
ovale Aorta
104
0.40
0.30
182 0.37
182
169
Ductus venosus Plate 8.18
0.36 0.6
78 130
130
52
Lower body
Portal vein
Umbilical cord
Umbilical arteries Umbilical vein
Placenta
B. Pulmonary circulation before C. Hypoxic vasoconstriction
and after birth in fetus
Pulmonary artery: 3
2 1.0
1 Blood flow
(L/min) 1 0.8
0
75 Pulmonary vascular resistance (mmHg·min·mL –1 ) 0.6
2 Systolic 50 0.4
pressure in
pulmonary 25 0.2
artery
(mmHg) 0 20 28 36 1 2 3 4 0
0 5 10 15 20 25
Week of Weeks O 2 pressure in pulmonary artery
gestation after birth (mmHg) 221
(After Rudolph) Birth (After Levine) (Measured in lamb fetus)
Despopoulos, Color Atlas of Physiology © 2003 Thieme
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