Question

Which of the following sequences is truely a systemic circulation pathway?

• A. Left auricle $\to$ Left ventricle $\to$ Pulmonary aorta $\to$ Tissues $\to$ Right auricle
• B. Left auricle $\to$ Left ventricle $\to$ Aorta $\to$ Arteries $\to$ Tissues $\to$ Veins $\to$ Right atrium
• C. Right ventricle $\to$ Pulmonary aorta $\to$ Tissues $\to$ Pulmonary veins $\to$ Left auricle
• D. Right auricle $\to$ Left ventricle $\to$ Aorta $\to$ Tissues $\to$ Veins $\to$ Right auricle

Answer 1

The correct option is B Left auricle $\to$ Left ventricle $\to$ Aorta $\to$ Arteries $\to$ Tissues $\to$ Veins $\to$ Right atrium

• Systemic circulation carries blood from the heart to the tissues and then carry deoxygenated blood from tissues towards the heart.
• It helps to distribute the nutrients to different tissues and picks the carbon dioxide and waste.
• Systemic circulation involves the movement of blood from lungs to the left auricle through pulmonary vein, which is then pumped to the left ventricle. From here the blood goes through aorta which divides into arteries.
• The arteries carry the blood towards the tissues and the deoxygenated blood is returned to right auricle through veins.
• Thus the correct answer is option B.