the heart- cardiac cycle

Question 1

what is heart relaxation known as

Answer 1

diastole

Question 2

decribe the process of diastole

Answer 2

blood enter atria and ventricles from pulmonary vein and vena cava
semi lunar valves close
left and right atrioventricular valves open

ventricles and atria relax and fill with blood

Question 3

what are the other two process in a heart beat that involve contraction

Answer 3

atrial systole
ventricular systole

Question 4

describe the process of atrial systole

Answer 4

atria contract pushing blood through bicuspid valve into ventricle

semilunar valves closed

Question 5

describe the process of ventricular systole

Answer 5

semi lunar valves opne
ventricles contract and blood moves out of heart

Question 6

how are the ventricles adapted for their function

Answer 6

have thicker walls - harder push

Question 7

what is pressure difference in the right ventricle compared to the left

Answer 7

right ventricle pressure is lower

Question 8

why is the right ventricle pressure lower

Answer 8

becuse the left ventricle has to pump blood further. e.g to the brain where as the right ventricle only has to pump blood to the lungs which doesnt require much strength