Which is the correct direction of blood flow?
a) right atrium --> right ventricle --> pulmonary artery
b) right atrium --> left atrium --> pulmonary artery
c) left ventricle --> pulmonary artery --> aorta
d) left ventricle --> left atrium --> aorta
2 answers
(a) is correct for the flow of deoxygenated blood flowing on its way to the lungs for oxygen input.
b) right atrium --> left atrium --> pulmonary artery