First slide

Circulatory Pathways

Question

Which of the following is a correct feature of the human circulatory system?

Easy

A

Right ventricle has the thickest wall among the four heart chambers.
B

The pulmonary artery as well as the pulmonary vein carry deoxygenated blood.
C

The tunica externa is comparatively thin in the veins.
D

The sino-atrial node is present in the right upper corner of the right atrium.

Solution

SAN is located in the upper right corner of right atrium.
Left ventricle has the thickest wall of all the 4 chambers of heart.
Pulmonary veins carry oxygenated blood.
Tunica media is thin in veins.

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