Prevents blood from flowing back into the atria when the ventricles contract.

• Tricuspid and bicuspid valves

• AV Node

• SA Node

• Semilunar Valves

One of the body's largest blood vessels that transports blood from the body region below the diaphragm

• Inferior Ventricles

• Left Ventricle

• SA Node

• Semilunar Valves

When blood leaves this chamber of the heart, it heads out to the body.

• Inferior Ventricles

• Left Ventricle

• SA Node

• Semilunar Valves

When this chamber contracts it pushes blood through the tricuspid valve.

• Inferior Ventricles

• Left Ventricle

• Right Atrium

• Semilunar Valves

Initiates the action potential that causes the heart to beat.

• Inferior Ventricles

• Left Ventricle

• SA Node

• Semilunar Valves

When blood leaves this chamber of the heart, it heads to the lungs.

• Inferior Ventricles

• Right Ventricle

• SA Node

• Semilunar Valves

Stops blood leaves this chamber of the heart, it heads to the lungs

• Inferior Ventricles

• Right Ventricle

• SA Node

• Semilunar Valves

Responsible for distributing electrical impulses throughout the heart.

• Inferior Ventricles

• Right Ventricle

• AV Node

• Semilunar Valves

This blood vessel splits in two and sends oxygen-poor blood to the lungs

• Pulmonary Veins

• Right Ventricle

• AV Node

• Pulmonary Trunk

The chamber in the heart that receives oxygenated blood from the lungs.

• Pulmonary Veins

• Right Ventricle

• Left Atrium

• Semilunar Valves