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.
What is the function of nodal muscular tissue ?
Purkinje fibres are present in
Give difference : Atrium and Ventricles
Valves are necessary in veins but not in arteries because
Give the location of tricuspid valve