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What is the heart's innermost layer and therefore comes into direct contact with circulating blood? Endocardium
What is the heart's outermost layer? Pericardium
What is the thickest part of the heart? Myocardium
What structure allows blood to flow from the left atrium into the left ventricle? Mitral valve (also known as Bicuspid Valve)
What structure allows blood to flow from the right atrium into the right ventricle? Tricuspid valve
What structure allows blood to flow out of the the left ventricle into the aorta? Aortic valve
What is the largest artery in the body? Aorta
The superior vena cava empties into what? Right atrium
The inferior vena cava empties where? Right atrium
What structure returns oxygenated blood to the heart? Pulmonary veins
Through what structure is blood pumped into lungs? Pulmonary artery
Which part of the heart does most of the work? Left ventricle-so the walls are the thickest!
How doe the heart get its own blood supply? Right and Left Coronary Arteries
What structures branch off of the ascending aorta? Coronary arteries
What is the main function of heart valves? Keep blood from flowing backwards
How long is a normal heart beat? 0.8 seconds: 0.4 seconds to contract and 0.4 seconds to relax.
When reading an EKG, what represents atrial depolarization? P wave
On EKG, what represents ventricular depolarization? QRS complex
On EKG, what represents ventricular repolarization? T wave
Created by: shocklori



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