Circulatory System

The liquid, pale yellow part of blood is called

• Plasma

• Antigens

• Blood cells

• None of the above

The finest of all blood vessels are the:

• veins

• arteries

• vena cavae

• capillaries

The device used to hear heartbeats is called a______________

• manometer

• hydrometer

• thermometer

• stethoscope

The stretching and relaxing of artries with each heartbeat is felt as a throbbing called________________.

• cardiac cycle

• pulse

• diastole

• none of the above

The only vein to carry oxygenated blood is ________________

• pulmonary vein

• pulmonary artery

• aorta

• inferior vena cava

The vessels that carry blood away from the heart are called _____________

• arteries

• capillaries

• bronchi

• veins

This blood vessel has valves to prevent the back flow of blood. 

• veins
• capillaries
• arteries

WBC are also called -

• Erythrocytes

• Thrombocytes

• Leucocytes

• Plasma

The part of the heart that contains only oxygen-rich blood is. . . .

• 1 and 2

• 1 and 3

• 2 and 4

• 2 and 3

Which of the following has walls that are one cell thick and is a site for diffusion?

• Vein

• Artery

• Capillary

• Aorta