Question

Assertion:- the muscular walls of ventricles thicker than auricles
Reason :- this helps in preventing the back flow of blood

Answer 1

Answer:

the answer to this is,reason-true;assertion-false

Explanation:

the muscular walls of ventricles thicker than auricles because the ventricles need to pump the blood to very distant parts of the body(in the case of brain ,against the gravity too)hence they need more muscles;the auricles on the other hand pump blood to the ventricles which are right next to them

Answer 2

Answer:

the answer to this is,reason-true;assertion-false

Explanation: