Question

Which statement is true for structure of human heart?

• A. The walls of atria are thin while the wall of ventricles are thick.
• B. There is a bicuspid valve between right atrium and right ventricles.
• C. There is a tricuspid valve between left atrium and left ventricles.
• D. The upper two chambers of heart is called ventricles and lower two chambers is called atria.

Answer 1

The correct option is A The walls of atria are thin while the wall of ventricles are thick.

The human heart has four chambers upper two chambers are atria and lower two chambers are ventricles. The wall of ventricle is thicker than atria because blood is pumped out of the heart with high pressure from ventricles. The valve between right atrium and right ventricle is called as tricuspid. It consists three membranous flap. The valve between left atrium and left ventricle is called as bicuspid. It consists two membranous flap. Thus, the correct answer is option A.