Assertion (A): The muscular walls of ventricles are thicker than auricles.  

Reason (R): This helps in preventing the backflow of blood.  



Ventricles pump oxygenated blood  into various organs with high pressure. Hence they need thicker muscular walls than atria do. 


Valves prevent backflow of  blood.



  • The assertion is True
  • The reason is False

valves prevent the back flow of blood by opening and closing tightly to guide the flow of blood in specific directions-01.jpg

So, the correct answer is (c)

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo