Heartbeat

+## Other uses

+The term "Heartbeat" can also refer to the second episode of the animated series [Murder Drones](/wiki/Murder_Drones).

+A heartbeat is the rhythmic contraction and relaxation of the [Heart](/wiki/Heart), circulating [Blood](/wiki/Blood) throughout the body. This vital, self-sustaining rhythm is a fundamental indicator of life and physiological function.

+## See also

+- [Circulation](/wiki/Circulation)

+- [Pulse](/wiki/Pulse)

+- [Organ](/wiki/Organ)