impulses in the heart

Question 1

what is myogenic

Answer 1

the capacity of the heart to generate its own impulses

Question 2

sinoatrial node

Answer 2

a small mass of cardiac muscles found in the wall of the right atrium that’s generates the heart beat

Question 3

atrioventricular node

Answer 3

this node relays the impulse between the upper and lower sections of the heart

Question 4

systole

Answer 4

when the heart contracts

Question 5

bundle of his

Answer 5

collection of heart muscle cells that transmit electrical impulses from the avn via the branches to the ventricles

Question 6

purkyne firbres

Answer 6

muscle fibres that conduct impulses in the walls of the ventricles

Question 7

orders that these impulses travel

Answer 7

sa node
atrial systole
atroventricular node
bundle of his
bundle beaches
purkinjie firbres
ventricular systole

Question 8

how do the impulses make the heart beat

Answer 8

-starts in the heart muscle itself with an electrical signal in the san
-electrical impulses then spreads through the heart as a wave
-from the sa node the impulse travels to the walls of the atria, causing them to contract forcing blood into the ventricles
-impulse passes through the av node found in the septum, which allows atria to fully contract
-impulse passes down through the bundle of his, spilts into 2 branches which split into purkinje fibres
-impulse travels down these fibres causing ventricles to contract and blood to be pumped out the heart