Heart

Systemic Circulation

Blood travels from the heart to the body and back.

What do arteries do in systemic circulation?

They carry oxygenated blood away from the heart.

What is the role of veins in systemic circulation?

They return deoxygenated blood to the heart.

Pulmonary Circulation

Blood travels from the heart to the lungs and back.

What does the pulmonary artery carry?

Deoxygenated blood to the lungs.

What does the pulmonary vein carry back to the heart?

Oxygenated blood.

Atria

Upper chambers of the heart that receive blood.

Right Atrium

Receives deoxygenated blood from the body.

Left Atrium

Receives oxygenated blood from the lungs.

Ventricles

Lower chambers of the heart that pump blood out.

What does the right ventricle do?

Pumps deoxygenated blood to the lungs.

What is the function of the left ventricle?

Pumps oxygenated blood to the body; it is the strongest chamber.

Valves

Prevent backflow of blood in the heart.

What are Atrioventricular (AV) Valves?

Valves that separate the atria from the ventricles.

Tricuspid Valve

Valve between the right atrium and right ventricle.

Mitral (Bicuspid) Valve

Valve between the left atrium and left ventricle.

What are semilunar valves?

Valves that control blood flow from the ventricles to the arteries.

Pulmonary Valve

Valve between the right ventricle and pulmonary artery.

Aortic Valve

Valve between the left ventricle and aorta.

Aorta

Largest artery, carries oxygenated blood from the left ventricle.

What are arterioles?

Smaller branches of arteries.

Vena Cava

Largest vein, returns deoxygenated blood to the right atrium.

What does the superior vena cava do?

Returns blood from the upper body.

What does the inferior vena cava do?

Returns blood from the lower body.