VI: Pulmonary Circulation + Differences w/ Systemic Circulation Flashcards
All cardiac output passes through pulmonary circulation except:
Bronchial arteries
Coronary arteries
Fetal short circuits
Is O2 saturation ever 100% in bronchial arteries
No
Size comparison
Pulmonary circulation irrigates the lungs
Systemic circulation irrigates the rest of the organs
Pressure at capillary
20mmHg
Pressure at RIGHT ATRIUM diastolic
0mmHg
Pressure at RIGHT VENTRICLE diastolic
0mmHg
Pressure at RIGHT VENTRICLE systolic
20mmHg to send blood to pulmonary artery
Pressure at PULMONARY CIRCULATION
25/8mmHg
Pressure at PULMONARY CAPILLARY
7mmHg
Pressure at LEFT ATRIA
2-8mmHg
Pressure at LEFT VENTRICLE
100-120mmHg to go to systemic circulation
Why is the pressure required at systemic circulation much greater than the one needed for pulmonary circulation
Because the heart has to pump blood to all the organs in the body, even some above it
While pulmonary circulation only irrigates the lungs + its at the same level as the heart
Short circuits in fetuses
Ductus arteriosus connecting the pulmonary artery with the aorta
Atrial septal defect that connects the 2 atria (ostium primum and secundum)
What compensates the high resistance in systemic circulation
The high pressure
Why are there thicker vessels in systemic circulation
Because systemic circulation needs a greater force to generate the pressure
