Heart function: In humans

In humans, deoxygenated blood enters the heart through the right atrium from the superior and inferior venae cavae and passes to the right ventricle. From here, it is pumped into pulmonary circulation to the lungs, where it receives oxygen and gives off carbon dioxide. How does the heart work? Find out with detailed explanations of its anatomy, blood circulation pathways, and the essential functions of this life-sustaining pump. In this dual-loop system, the heart functions not just as a mechanical pump but as a dynamic, responsive regulator of life. It adapts moment-to-moment, increasing output during exercise, decreasing it at rest, and fine-tuning the flow based on the body’s needs. Human Heart : How the Heart Works 1.0 Heart Size – 5 inches length × 3.5 inches wide × 2.5 inches thickness Colour – Reddish brown Shape – Conical Weight – 250 – 300 gm. The heart is a muscular cone-shaped organ about the size of a clenched fist of the same person. It is located in the upper body (chest area) between the lungs and with its broad base facing upward and backward and narrow apex directed downwards, forwards and slightly towards the left. Structure of Heart The heart ...