Which of the Following Best Describes the Pathway an Oxygen

Multiple Choice

Which of the following best describes the pathway an oxygen molecule would take through the human circulatory system?

A) systemic tissues → alveoli → pulmonary vein → pulmonary capillaries → systemic capillaries → left ventricle → left atrium → aorta → systemic arteries
B) alveoli → pulmonary capillaries → pulmonary vein → left atrium → left ventricle → aorta → systemic arteries → systemic capillaries → systemic tissues
C) alveoli → pulmonary capillaries → pulmonary artery → right atrium → right ventricle → pulmonary vein → systemic arteries → systemic capillaries → systemic tissues
D) alveoli → pulmonary vein → pulmonary capillaries → systemic capillaries → left atrium → left ventricle → aorta → systemic arteries → systemic tissues