Heart and Circulatory System

What is O?

Which letter is the pulmonary artery?

• N

• M

• A

• C

Which valve is K? (do not include valve in your answer)

Which letters represent veins?

• A

• N

• M

• C

Which valve prevents backflow into the left atrium?

• bicuspid

• tricuspid

• aortic

• pulmonary

The semi-lunar valves close when the pressure in the artery is greater than the pressure in the ventricle.

• True

• False

The stroke volume is 100cm³. The heart rate is 70bpm. What is the cardiac output? [Number only]

Which type of blood vessel has the thickest walls?

• artery

• vein

• capillary

Which feature of arteries ensures maintenance of pressure and smoothing of blood flow?

• elastic tissue

• muscle

• endothelial lining

Which type of blood vessel has the widest lumen in relation to its overall diameter?

• artery

• arteriole

• venule

• vein

• capillary