Section: Human Body

The Science of Circulation in Space

What Blood Type Says About You (and Why It Matters)

How Stress Impacts Your Circulatory System

Why Athletes Have Lower Resting Heart Rates

How Emotions Affect Heart Rate

The Amazing Adaptability of the Heart

What Happens When Blood Flow Is Blocked

The Hidden Network of Capillaries: Tiny Vessels, Huge Job

How the Circulatory System Feeds the Brain

The Link Between the Circulatory and Immune Systems

How Platelets Help You Heal

Red Blood Cells vs. White Blood Cells — What’s the Difference?