The FDA has updated labels on the top two COVID-19 vaccines to warn of a rare heart side effect, mostly seen in young men.

The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is ...

Learn about the anatomy of the heart and how its chambers, valves, and vessels work together to maintain effective blood circulation throughout the body to sustain life.

The formation of the heart depends on critical signals exchanged between its two main layers: the myocardium (the muscle that powers the heartbeat) and the endocardium (the inner lining of the heart).

Skeletal muscle is the type of muscle that controls movement. Problems with these muscles can be minor, life-threatening, or ongoing problems that make it hard to perform basic daily activities.

The formation of the heart depends on critical signals exchanged between its two main layers: the myocardium (the muscle that ...

Anatomy of the Heart . Your heart is made up of several chambers, valves, layers, ... The heart muscle is about the size of a fist and has the shape of an upside-down cone.

A collection of coronary veins join to form the CS. This large vein receives blood from the myocardium, which is a thick layer of muscle in the heart.It then passes this venous blood into the ...

Myocarditis is a disease that causes inflammation in a middle layer of the heart muscle called the myocardium. The inflammation affects muscle cell function and the heart’s electrical system, ...

Ischaemic heart disease, or a lack of blood supply to the heart muscle, is known to be the biggest single contributor to the number of heart failure patients.

What the heart is made of: Heart muscle tissue, also called cardiac muscle tissue. What makes the heart beat: Electrical signals. Average resting heart rate: 60 to 100 beats per minute (in adults) ...