Circulatory system

Question 1

What takes blood away from the heart?

Answer 1

Arteries, exception- pulmonary artery

Question 2

What brings blood to the heart?

Answer 2

Veins

Question 3

What supply the heart muscles?

Answer 3

Coronary blood vessels

Question 4

What causes a heart attack?

Answer 4

Blockage in an artery, bypass can be done

Question 5

Cardiac cycle

Answer 5

Sequence of events that occurs in one complete beat of the heart

Question 6

2 phases of heart cycle

Answer 6

Diastolic- relaxation to refill blood (top blood pressure No.) , systolic- contraction of ventricles to pump blood (bottom blood pressure No.)

Question 7

Where is blood pressure the greatest

Answer 7

Ventricles as they move blood the furthest

Question 8

Cardiac cycle order

Answer 8

Atrial and ventricular diastole (relaxing and filling), Atrial systole, ventricular systole (contracting and pumping)

Question 9

What happens in atrial and ventricular diastole

Answer 9

Left and right AV valves open (bicuspid and tricuspid) are open, atria and ventricles relaxed, blood flows into left and right atria from vena cava and pulmonary artery into the ventricles

Question 10

What happens in atrial systole

Answer 10

Atria contract forcing any remain blood into the ventricles

Question 11

What happens in ventricular systole

Answer 11

Atria relax and start to refill, AV valves are closed but semi-lunar valves are open, ventricles contract forcing blood to the pulmonary artery and aorta, semi-lunar valves close

Question 12

First “lubb” sound of the heart

Answer 12

Closing of AV (bicuspid and tricuspid) valves

Question 13

Second “dupp” sound of the heart

Answer 13

closing of semi-lunar valves

Question 14

Rate of blood flow depends on

Answer 14

How fast the heart is beating and how much blood the heart pumps out from a ventricle

Question 15

Cardiac output

Answer 15

amount of blood leaving the ventricles every minute, = heart rate x stroke volume