The tricuspid valve is found in .............

The right auricle of the mammalian heart receives blood from:

Assertion : $Lub$ is a heart sound which is produced during each cardiac cycle.
Reason : It is associated with the closure of the tricuspid and bicuspid valves.

Where is the pericardial fluid secreted from?

The pacemaker of the heart is known as ........

The "Bundle of His" is considered to be a part of which of the following organs?