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.
The coronary sinus in the heart is situated along its
Purkinje fibres are present in
What is the function of valves in the heart?
Give difference : Atrium and Ventricles