heart

AV valves

control blood flow between atria and ventricles

what is the right AV valve called

tricuspid

what is the left AV valve called

mitral

chordae tendinae

cords that connect AV valves to papillary muscles

semilunar valves

control flow into great arteries

what makes semilunar valves open and close

blood flow and pressure

what side is the pulmonary semilunar valve on

right

what side is the aortic semilunar valve on

left

when the ventricles RELAX, pressure ?

drops

when ventricles RELAX, semilunar valves

close

when ventricles RELAX, AV valves

open

when ventricles RELAX, blood flows from ____ to _____

atria, ventricles

when ventricles CONTRACT, pressure

rises

when ventricles CONTRACT, AV valves

close

when ventricles CONTRACT, semilunar valves

OPEN

coronary artery disease

constriction of coronary arteries caused by accumulation of lipid deposits that degrade arterial wall and obstruct lumen

what causes coronary artery disease

endothelium is damaged by hypertension or diabetes

angina pectoris

chest pain from partial obstruction of coronary blood flow

what happens during angina pectoris

myocardium shifts to anaerobic fermentation due to lack of oxygen, producing lactic acid and causing pain

mycardial infarction

sudden death of a patch of myocardium resulting from long term obstruction of coronary circulation

smallest cardiac veins

thebesian

why doesn’t cardiac muscle fatigue

it makes little use of anaerobic fermentation or oxygen debt mechanisms and has large amount of mitochondria