Ch. 20 – The Heart The heart is the muscular pump of the cardiovascular system It performs ~ 100,000 heartbeats/day It pumps ~ 8000 liters of blood/day. - ppt video online download
Smooth muscle gap-junctions allow propagation of intercellular Ca2+ waves and vasoconstriction due to Ca2+ based action potentials in rat mesenteric resistance arteries - ScienceDirect