Synopsis

A constant, tireless rhythm sustains life: the heart’s ceaseless circulation of blood. Roughly the size of a fist, this vital organ is composed of a unique muscle known as cardiac muscle. This specialized muscle ensures a steady beat, capable of adjusting its pace to meet the body's demands. Functioning like an automatic pump, the heart contracts and relaxes in a rhythmic cycle, propelling blood through its four chambers. Valves, acting as one-way doors between these chambers, guarantee uni