Multiple choice

Muscular walls of ventricles are thicker than walls of atria because ventricles have to

  1. pump blood into various organs

  2. receive deoxygenated blood from various organs

  3. receive oxygenated blood from various organs

  4. produce blood

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A Correct answer
Explanation

Muscular walls of ventricles are thicker than walls of atria because ventricles have to pump blood into various organs.