Question

Choose the incorrect statement.

• A. Atria are thin.
• B. Atria are the blood-receiving chambers.
• C. Walls of atria are thicker than ventricles.
• D. None of these

Answer 1

The correct option is C Walls of atria are thicker than ventricles.

Atria are thin, less muscular walls and smaller than ventricles. These are the blood-receiving chambers that are carried to the heart by the large veins. Ventricles have thicker walls than atria and generate higher blood pressures. Further, the left ventricle has thicker walls than the right because it needs to pump blood to most of the body while the right ventricle fills only the lungs.