HMS, BM EQ-Bank 58 MC

During a 400 metre sprint, an athlete's oxygen demand increases. Which sequence correctly shows the pathway of oxygen from inhalation to the working muscles?

Alveoli → Pulmonary vein → Left atrium → Left ventricle → Systemic circulation
Alveoli → Pulmonary artery → Left atrium → Left ventricle → Systemic circulation
Bronchi → Pulmonary vein → Right atrium → Right ventricle → Systemic circulation
Bronchi → Pulmonary artery → Right atrium → Right ventricle → Systemic circulation

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\(A\)

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A is correct: Oxygen diffuses into alveoli, enters pulmonary veins (oxygenated blood), flows to left atrium then left ventricle, enters systemic circulation to muscles.

Other Options:

B is incorrect: Pulmonary arteries carry deoxygenated blood
C is incorrect: Right side of heart receives deoxygenated blood; bronchi are airways not blood vessels
D is incorrect: combines multiple errors (wrong vessels and wrong heart side)