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At any given time, about how many thunderstorms are in progress on Earth?
Atrioventricular (AV) Node
A component of the cardiac electrical conduction system located between the atria and ventricles that delays the transmission of electrical impulses to allow for proper filling of the ventricles.
Bundle of His
A collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node to the point of the apex of the fascicular branches.
Myocardial Infarction
A medical condition also known as a heart attack, which occurs when blood flow to a part of the heart is blocked for a long enough time to cause damage or death to heart muscle.
Pulmonary Artery
A major blood vessel that carries deoxygenated blood from the right side of the heart to the lungs for oxygenation.
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