A. Each myofibril is striated with dark (A) and light (I) bands.

Each skeletal muscle contains long units called myofibrils, and each myofibril is a chain of sarcomeres.

What they discovered was that, in a healthy myofibril, all the neighbouring sarcomeres adjust to the activation of one single sarcomere.

These protein strands are anchored to the structure of the myofibril, and lie parallel to each other.

Inside each myofibril are strands or filaments made of two different proteins called actin and myosin.

He is 31 and a father of three who was recently diagnosed with an aggressive blood cancer called primary myelofibrosis.

The term myofibril should not be confused with myofiber, which is a simply another name for a muscle cell.

The filaments inside of a myofibril do not extend the entire length of a muscle cell, instead they are arranged in compartments called sarcomeres.

The term myofibril should not be confused with myofiber, which is a simply another name for a muscle cell.

The filaments inside of a myofibril do not extend the entire length of a muscle cell, instead they are arranged in compartments called sarcomeres.

Along the length of the myofibril, there are sections called sarcomeres which describe the system of actin and myosin filaments.

The term "myofibril" should not be confused with "myofiber", which is a simply another name for a muscle cell.

The term "myofibril" should not be confused with "myofiber", which is a simply another name for a muscle cell.

These proteins are organized into thin filaments and thick filaments, which repeat along the length of the myofibril in sections called sarcomeres.

These proteins are organized into thick and thin filaments, which repeat along the length of the myrobibril in sections called sarcomeres.