Second, cardiac muscle fibers are branched and interconnected. When the pacemaker cells generate an impulse, it spreads in an organized, wavelike pattern, which facilitates the beating of your heart.

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

The cardiac muscle tissue of your right ventricle is replaced with fatty or fiber-rich tissue. This can lead to arrhythmia , which refers to an abnormal heart rate or rhythm. Not all cases of ...

Cardiac muscle tissue gets its strength and flexibility from its interconnected cardiac muscle cells, or fibers. Most cardiac muscle cells contain one nucleus, but some have two. The nucleus ...

A muscle "fiber" is what we call a muscle cell. Muscle cells contract and relax in response to messages from our central nervous system. Our bodies have three different kinds of muscle. Cardiac ...

These findings come after many years of research into the topic, with e.g. Zihan Wang and colleagues in a 2021 paper reporting on the challenges remaining with 3D printing cardiac tissue, yet also ...

Cardiac muscle, like skeletal muscle, is also powered by mitochondria, but it has many, many more: The total volume of the heart . . . is [comprised of] between 30 and 35% mitochondria.

A Working System. All humans have both type I and type II muscle fibers, but the distribution varies greatly. Most people, regardless of gender, have a type I fiber distribution of 45–55 percent ...