Question

The contraction of heart is known as

• A. Systole
• B. Diastole
• C. SA node
• D. None of the above

Answer 1

The correct option is A Systole

• Diastole and systole are two phases of the cardiac cycle. They occur as the heart beats, pumping blood through a system of blood vessels that carry blood to every part of the body.
  
• Systole occurs when the heart contracts to pump blood out, and diastole occurs when the heart relaxes after contraction.
  
• The SA node generates electrical impulses and conducts them throughout the muscle of the heart, stimulating the heart to contract and pump blood.
  
• So, the correct answer is 'Systole'.