The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

This colorful tapestry is a section of heart tissue from a zebrafish. The pink clusters are T cells, immune cells that help defend against disease. This colorful tapestry is a section of heart tissue ...

Immunofluorescence staining elucidates cellular and extracellular compositions pivotal for cardiac repair. All cell nuclei are seen in blue, while the red stain delineates cardiomyocytes. The ...

More than 300,000 people suffer a heart attack in Germany every year. The heart muscle is then no longer supplied with sufficient blood and oxygen, and part of the tissue dies and scars. Unlike the ...

Coin-sized disks cut from the cocoon of the tasar silkworm grub provide a basic scaffold for heart muscle cells.Image: MPI for Heart and Lung Research Because damaged human-heart muscle cannot be ...

A major heart attack can change the rest of your life. Even when doctors clear a clogged artery in time, your heart may still struggle to bounce back. Damaged muscle often turns into stiff scar tissue ...

Johns Hopkins Medicine scientists who arranged for 48 human bioengineered heart tissue samples to spend 30 days at the International Space Station report evidence that the low gravity conditions in ...