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CV reading

where does the blood that is low in oxygen and high in carbon dioxide enter the heart? enters through the right atrium
what is the valve called that passes through when it leaves the right atrium? tricuspid vavle
after blood becomes oxygenated in the lungs, what are the vessels called that return it to the heart? pulmonary veins
what chamber of the heart does oxygenated blood returning to? left atrium
where does the blood go after it leaves the left atrium? left ventricle
what is the name of the vessel that carries the oxygenated blood to the body? aorta
what are the first two branches of the aorta called ? right and left coronary arteries
what do the coronary arteries supply blood to? tissue of the heart
what supplies oxygen and nutrients to the myocardium if a coronary artery is blocked? collateral circulation
what is the enlarged vein that lies on the posterior surface of the heart? cardiac veins
what is it called when the atria contract? systole
what is it called when the ventricles contract? diastole
a complete heart beat is also known as? cardiac cycle
when pressure in the ventricles is low what valves open and allow the ventricles to fill with blood? the A-V valve
how much blood enters the ventricles before it contracts? 70%
what happens to the rest of the blood? 30% of it is pushed into the ventricles
what are the atria doing when the ventricles are contracting ? they are relaxing
what does the heartbeat heard through a stethoscope sound like? lubb-dupp
when does the first part of a heart sound occur? during ventricular contraction
when does the second part of the heart sound occur? during ventricular relaxtion
what is the mass of merging cells called that function as a unit ? functional syncytium
what two places in the heart contain this unit ? atrial and ventricular syncytium
what connects the atrial and ventricular syncytium cardiac conduction system
Created by: Mckenzie.wilson