Cardiac output is determined by

Purkinje fibers are located in the following structure/s:

The tricuspid valve is present at the origin of

Where is the pericardial fluid secreted from?

$SAN$ generates an action potential which stimulates both the $A$ to undergo a simultaneous contraction called $B$. This increases the flow of the blood into the ventricles by about $C$ percentage. Choose the correct option for $A, B$ and $C$.

Which organ is supplied with blood by the coronary artery?