Circulatory System

Atria pumps blood to the:

• Arteries

• Veins

• Body cavities

• Ventricles

The only artery in humans that carries deoxygenated blood is the:

• Pulmonary artery

• Aorta

• Renal artery

• Carotid artery

The direction of blood flow through the human body is maintained by:

• The elasticity of the vein walls

• The pump action of the heart

• Muscular contractions

• A system of valves

Blood:

• Is pumped from the heart into the veins

• Enters the left atrium from the lungs

• Is not involved in temperature control

• Can pass round the body in less than a minute

Blood leaves the heart in two vessels, namely the:

• Aorta and pulmonary vein

• Pulmonary artery and aorta

• Aorta and venae cavae

• Pulmonary artery and pulmonary vein

A boy is bitten by a venomous snake on his left leg. Poison gets to his heart through the:

• Pulmonary vein

• Left subclavian artery

• Inferior vena cava

• Superior vena cava

Which of the following contain deoxygenated blood?

• Left ventricle

• Pulmonary vein

• Right atrium

• Coronary artery

The phase in the cardiac cycle when blood is pumped out of the ventricles is called:

• Atrial systole

• Ventricular diastole

• Atrial systole

• Ventricular systole

A blood vessel is called an artery when it:

• Transports oxygenated blood to the heart

• Transports blood to the heart

• Contains many valves

• Transports blood away from the heart

One of the three functions of the circulatory system is:

• Carries waste away from our cells

• Helps regulate body temperature

• Delivers needed substances to the cells

• All of the above