Circulatory System

Atria pump 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

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

• pulmonary vein

• superior vena cava

• inferior vena cava

• hepatic portal vein

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

• atrial systole

• ventricular diastole

• atrial diastole

• ventricular systole

A blood vessel is called an artery when it:

• transports oxygenated blood to the heart

• contains many valves

• transports blood to the heart

• transports blood away from the heart

The functions of the circulatory system include:

• carries waste away from the cells of the body

• helps regulate body temperature

• delivers needed substances to the cells

• all of the above

The tricuspid valve is present between:

• the left atrium and left ventricle

• the right atrium and right ventricle

• the left atrium and right atrium

• the right ventricle and the left ventricle

The bicuspid and tricuspid valves are closed during

• ventricular systole

• ventricular distole

• atrial systole

• late joint diastole

The left atrium receives oxygenated blood through:

• the coronary artery

• the aorta

• the pulmonary artery

• the pulmonary vein

In human beings, the duration of one cardiac cycle is:

• 0.08 seconds

• 0.5 seconds

• 0.8 seconds

• 8 seconds