Question

A correct systemic circulation pathway is

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

Answer 1

Answer: (C)

Left auricle $\to$ Left ventricle $\to$ Aorta $\to$ Arteries $\to$ Tissues $\to$ Veins $\to$ Right atrium

Systemic circulation is the flow of blood from left ventricle of heart to all body parts and return of blood from all body parts to the right auricle. The pathway of systemic circulation can be summarised as:

• Pulmonary vein brings oxygenated blood from lungs to the left auricle.
• From the left auricle blood passes to left ventricle through bicuspid valve.
• From the left ventricle, blood is pumped into aorta.
• Aorta divides into many arteries and supply blood to body tissues.
• The oxygen in blood is utilised by tissues and deoxygenated blood is collected by veins.
• The vena cava brings this deoxygenated blood into the right atrium from where it passes to right ventricle through tricuspid valve.
• From the right ventricle, deoxygenated blood is carried to lungs by the pulmonary artery where it is gets oxygenated and returns to left auricle through pulmonary vein.
• Hence, in this way, the cycle starts again.

So, the correct answer is 'Left auricle →→ Left ventricle →→ Aorta →→ Arteries →→ Tissues →→ Veins →→ Right atrium'.