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21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
Immediate opening of atrio-ventricular valves allow passive filling of ventricles
b
Atrial syncitium and ventricular syncitium are separated by fibrous connective tissue
c
Atrial systole results in the active filling of ventricles
d
Heartbeats are initiated by catecholamines
answer is D.
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