Question

Which of the following are correctly paired?

• A. Auricles & arteries are thick-walled
• B. Ventricles and veins are thin-walled
• C. Auricles and veins are thin-walled
• D. Ventricles and arteries are thick-walled

Answer 1

Answer: (C), (D)

The correct options are
C

Auricles and veins are thin-walled

D

Ventricles and arteries are thick-walled

The ventricles of the heart have thicker muscular walls because blood is pumped out of the heart at a greater pressure from these chambers. To withstand the pressure of the blood coming out from the heart, arteries need thick walls. The returning blood in the veins is of low pressure and hence, vein walls are thinner and the auricles which receive the blood is thinner.