Heart veins

Computer artwork of the coronary vessels of the heart, showing he coronary arteries (red) and veins (blue).

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A human heart, showing the arteries and veins which supply blood to the cardiac muscles. The blood vessels, which lie immediately below the surface of the heart, have been injected with dyed gelatine, making visible the smallest capillaries which form this exquisite arterial network.

A ketone molecule produced by the body during calorie restriction keeps blood vessels young, staving off age-related chronic disease.

Veins

Human veins. Red silhouette vessel, arteries or capillaries on white background. Illustration about design, style, anatomy, human, line, vector, wallpaper, icon, anatomical - 260535666