A myofibril (also known as a muscle fibril or sarcostyle) [1] is a basic rod-like organelle of a muscle cell. [2] Skeletal muscles are composed of long, tubular cells known as muscle fibers, and these cells contain many chains of myofibrils. [3] Each myofibril has a diameter of 1–2 micrometres. [3]

2019年10月4日 · A myofibril is a component of the animal skeletal muscle. Myofibrils are long filaments that run parallel to each other to form muscle (myo) fibers. The myofibrils, and resulting myofibers, may be several centimeters in length.

2023年10月30日 · The contractile functional unit of the myofibril is called the sarcomere. The myofibrils have a characteristic banding pattern detected under a light microscope referred to as striations. The main function of the myofibrils is to produce muscle contraction and relaxation.

Myofibril, very fine contractile fibres, groups of which extend in parallel columns along the length of striated muscle fibres. The myofibrils are made up of thick and thin myofilaments, which help give the muscle its striped appearance.

Sarcomere, repeating unit form myofibril. Myofibrils are essentially polymers, or repeating units, of sarcomeres . The shortening of the individual sarcomeres leads to the contraction of the individual muscle fibres, leading to muscle contractions.

2025年3月7日 · Each array of filaments, called a myofibril, is shaped like a cylindrical column. Along the length of each myofibril alternate sets of thick and thin filaments overlap, or interdigitate, presenting alternate bands of dark regions (with thick filaments and overlapping thin ones) and light regions (with only thin filaments).

2025年1月15日 · The sarcomere is the fundamental unit of a myofibril, serving as the primary site for muscle contraction. It is a highly organized structure composed of repeating units that give skeletal and cardiac muscles their striated appearance.

A myofibril is defined as a contractile structure within a muscle fiber that is composed of myofilaments, including thick and thin myofilaments. It accounts for approximately 80% of the volume of a muscle fiber and consists of repeating units called sarcomeres.

2025年3月20日 · Myofibril: Building the Architecture of Muscle and Movement. Explore the structure and function of myofibrils, their role in muscle movement, and the factors influencing their organization and development.

myofibril a microscopic contractile filament of STRIATED MUSCLE, made up of a series of SARCOMERES. The myofibril is made up of numerous longitudinal filaments of two forms, thick (MYOSIN) and thin (ACTIN). See MUSCLE, I-BAND. Relatively little is known of the contraction of smooth muscle, where contractile elements’ are thought to contain ...