_The heart's labyrinthine chambers_

_a maze of muscle, blood, and bone_

_four hollowed spaces, each with its own rhythm_

_beating in tandem, a symphony of life_

_Atria, ventricles, septum, and valves_

_a delicate dance of contraction and release_

_deoxygentated blood flows in, a dark, velvety stream_

_oxygenated blood flows out, a vibrant, crimson tide_

_The sinoatrial node, a spark of electricity_

_igniting the heartbeat, a pulse of life_

_the atrioventricular node, a relay station_

_coordinating the beat, a synchronized stride_

_Blood flows, a river of life_

_through coronary arteries, a network of vessels_

_nourishing the heart, a selfless act_

_sustaining the body, a vital fact_

_The heartbeat, a drumbeat in the chest_

_a reminder of life, a pulsing quest_

_to pump, to flow, to nourish and sustain_

_the heart's anatomy, a wondrous, intricate refrain._