heart

Question 1

thickness of atria

Answer 1

thin

Question 2

thickness of ventricle

Answer 2

thick thick

Question 3

what is the heart made of

Answer 3

cardiac muscle

Question 4

what makes the heart pump

Answer 4

mygenic

Question 5

what does myogenic mean

Answer 5

neurones act on it to speed it up / slow it down

Question 6

whats the contraction phase

Answer 6

systole

Question 7

whats the relaxed phase

Answer 7

diastole

Question 8

whats the 3 bits of the cardiac cycle

Answer 8

AS - atrial systole
VS - ventricular systole
D - diastole

Question 9

what happens during atrial systole

Answer 9

atrium walls contract and blood pressure in atria increases

pushes blood through tricuspid and bicuspid valve down the ventricles

Question 10

what happens during ventricular systole

Answer 10

ventricle walls contract and increase blood pressure

up through semi-lunar valves out of the heart into pulmonary artery / aorta

Question 11

what happens during diastole

Answer 11

ventricles and atria relax
pressure falls

semi lunar valves close

blood from vena cava and pulmonary vein enters heart

Question 12

whats the middle bit of the heart called

Answer 12

septum

myocardium