PE- cardio and respiratory system

Atria- have a low pressure, contract and pushes blood into ventricles

Ventricles- High pressure to push blood away from heart

Valves- control direction of blood and prevent backflow

Blood vessels- Superior/inferior vena cava, pulmonary artery, pulmonary vein (x4), Aorta, coronary veins and cornory ateries

Cardiac muscle, allows contraction of chambers to push blood around

Heart is myogenic

Impulse at SA node (wall of right atruim)-->

Atria walls (contraction)-->

Ventricle walls are insulated here)-->

AV node (in spetum)-->

Delayed-->

Bundle of His-->

Purkinje fibres-->

Ventricle walls (contract)