Discover what the circulatory system actually does: oxygen delivery, nutrient transport, waste removal, immune support, and temperature regulation. Learn how the heart, blood vessels, and blood work together, plus science-backed tips to improve circulation and prevent common disorders.

Discover what the cardiac system does: oxygen delivery, nutrient distribution, waste removal, and vital support functions. Learn how your heart works with blood flow cycles, warning signs of trouble, and science-backed tips to maintain cardiovascular health. Includes FAQs and functional breakdowns.

Understand the structure of the human heart in plain English. Learn about chambers, valves, blood flow patterns, electrical systems, and common cardiac conditions with clear explanations.