The pacemaker of the heart is located in the .......

Where is the pericardial fluid secreted from?

$A$ heart murmur indicates a defective

Gap junctions are characteristically found in

$A$ specialised nodal tissue embedded in the lower corner of the right atrium,close to the atrioventricular septum,delays the spreading of impulses to the heart apex for about $0.1 \; sec$. This delay allows:

In a patient,the cardiac pacemaker stops functioning. The doctor decides to implant an artificial pacemaker. Its function is similar to which of the following?