Question

The atrial walls are ____than the ventricular wall, and pressure generated in the atrial chambers is___ than in the ventricles.

• A. thinner,higher
• B. thinner,lower
• C. thicker,higher
• D. thicker,lower

Answer 1

Answer: (B)

• Ventricles pump blood into the lungs and blood vessels that distribute the blood to all parts of the body.
  
• The ventricles of the heart have thicker muscular walls than the atria.
• This is because blood is pumped out at greater pressure from these chambers compared to the atria to efficiently pump blood to different parts of the body.
• The auricles are the “receiving chambers” as they receive blood from different body parts. They are smaller and have thin walls.

So, the correct option is 'thinner, lower'.