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

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

 

Answer

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

 

Valves prevent backflow of  blood.

 

Hence,

  • 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)

  1. Class 10
  2. Chapter 6 Class 10 - Life Processes (Term 1)

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo