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Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

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  


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Created by: shocklori