Write the feature that distinguish between the two : Sino-atrial node and Atrio-ventricular node
$SA$ node : It is a special type of muscular tissue formed in group of the wall of atrium. It initiates the heart beat.
$AV$ Node : Fibrous tissue located between right atrium and ventricle. Electric waves pass through it.
Describe internal structure of heart in detail.
Trilobed valve present between right atrium and ventricle in mammalian heart is
Give the location of tricuspid valve
Give the location of heart.