Papillary muscles are found in

The $SAN$ (Sino-atrial node) can generate action potentials at a rate of:

Which of the following minerals is responsible for regulating your heartbeats?

The opening of the post caval vein into the right atrium is guarded by which of the following?

Given below are two statements.
Statement $I$ - The heart sound $Dub$ is heard during ventricular diastole.
Statement $II$ - The heart sound $Lubb$ is heard during atrial systole.
In the light of above statements,select the correct option given below:

Where is the bicuspid valve located in the human heart?