SCI 9 Q1: Heart Valves

They allow blood to flow only in a forward direction by blocking it from returning to the previous chamber.

• Arteries

• One-way Trapdoors

• Valves

• Clotting

What are the 4 valves of the heart?

• Tricuspid valve: Atrioventricular Valve (AV)

• Pulmonary Valve: Semilunar Valve

• Mitral Valve: The Bicuspid Valve

• Aortic Valve: Semilunar Valve

• Tricuspid valve: Interatrial Valve (AV)

This valve controls the opening between the Right Atrium and the Right Ventricle. This prevents the blood coming back up into the atrium once it is in the Right Ventricle.

• Aortic Valve: Semilunar Valve

• Tricuspid Valve: Atrioventricular Valve

• Pulmonary Valve: Semilunar Valve

• Mitral Valve: Bicuspid Valve

It is located between the right ventricle and the pulmonary artery. This prevents blood that has been ejected into the pulmonary artery from returning to the right ventricle as it relaxes.

• Aortic Valve: Semilunar Valve

• Tricuspid Valve: Atrioventricular Valve

• Pulmonary Valve: Semilunar Valve

• Mitral Valve: Bicuspid Valve

Blood flows through this atrioventricular valve to the left ventricle and cannot go back up into the left atrium.

• Aortic Valve: Semilunar Valve

• Tricuspid Valve: Atrioventricular Valve

• Pulmonary Valve: Semilunar Valve

• Mitral Valve: Bicuspid Valve

This valve is located between the left ventricle and the aorta. Blood leaves the left ventricle through this valve and cannot return to the left ventricle.

• Aortic Valve: Semilunar Valve

• Tricuspid Valve: Atrioventricular Valve

• Pulmonary Valve: Semilunar Valve

• Mitral Valve: Bicuspid Valve