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 valves in the heart?
Definition / Explanation :
$(1)$ $AV$ valve (Tricuspid)
$(2)$ Mitral (Bicuspid) valves
Give the location of heart.
The opening of auricles and ventricles on the right side is guarded by
The coronary sinus in the heart is situated along its