_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 electrici...