What is the role of valves present in the heart?

The role of valves in the heart is to regulate blood flow and prevent backflow of blood, ensuring that blood moves in only one direction during each heartbeat.

The human heart is a muscular organ that pumps blood to the entire body. For this process to be smooth, valves act as gates that open and close at the right times. Without valves, blood could flow backward, leading to inefficiency and diseases.

Types of Heart Valves

• Atrioventricular valves (AV valves): Between atria and ventricles.
  • Tricuspid valve: Right atrium → Right ventricle
  • Bicuspid/Mitral valve: Left atrium → Left ventricle
• Semilunar valves: Between ventricles and main arteries.
  • Pulmonary valve: Right ventricle → Pulmonary artery
  • Aortic valve: Left ventricle → Aorta

Functions of Valves

1. Maintain one-way flow of blood.
2. Prevent mixing of oxygenated and deoxygenated blood.
3. Support proper circulation during each heartbeat.
4. Ensure efficient pumping action.