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 ...

Mammals, from the mighty blue whale to the tiny shrew, inhabit nearly every corner of our planet. Their remarkable adaptability to different environments has long fascinated scientists, with each ...

Curious to know if you're at risk for two common heart conditions? Your doctor may want to check the shape of your heart. Investigators from the Smidt Heart Institute at Cedars-Sinai have discovered ...

Your heart is a muscular organ that helps circulate your blood, which delivers oxygen and nutrients to your tissues. There are four chambers and four valves in your heart, and each ensures proper ...

A sigmoid septum occurs when part of the heart muscle expands and blocks a pathway blood uses to leave the heart’s left side. It often does not cause symptoms and has links to aging. The heart ...

Researchers have investigated the effect of increased cell temperature on the contractility of skeletal muscle and cardiac muscle by heating the muscle proteins using advanced microscopical techniques ...

When most people think of heart health, they imagine cardio exercises, nutritious meals and regular doctor visits. Yet, few would suspect a link between their heart and calf muscles. Surprising as it ...

What makes a body’s organs into what they are is more than just a grouping of specialized cells. They also need to be oriented and attached to each other and scaffolding in order to create structures ...

Hierarchical structure of muscle and activation of thin filaments. In both skeletal and cardiac muscles under a relaxed state, a low intracellular calcium ion concentration is maintained and the ...