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?
What is the heart's outermost layer?
What is the thickest part of the heart?
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?
What structure allows blood to flow out of the the left ventricle into the aorta?
What is the largest artery in the body?
The superior vena cava empties into what?
The inferior vena cava empties where?
What structure returns oxygenated blood to the heart?
Through what structure is blood pumped into lungs?
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?
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?
On EKG, what represents ventricular depolarization?
On EKG, what represents ventricular repolarization?