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A sarcomere is defined as the segment between two neighbouring Z-lines (or Z-discs). In electron micrographs of cross-striated muscle, the Z-line (from the German "zwischen" meaning between) appears in between the I-bands as a dark line that anchors the actin myofilaments. Surrounding the Z-line is the region of the I-band (for isotropic).
Cartesian coordinate system with a circle of radius 2 centered at the origin marked in red. The equation of a circle is (x − a)2 + (y − b)2 = r2 where a and b are the coordinates of the center (a, b) and r is the radius. Cartesian coordinates are named for René Descartes, whose invention of them in the 17th century revolutionized ...
All thin filaments are attached to the Z-line. Elastic filaments, 1 nm in diameter, are made of titin, a large springy protein. They run through the core of each thick filament and anchor it to the Z-line, the end point of a sarcomere. [citation needed] Titin also stabilizes the thick filament, while centering it between the thin filaments. It ...
Z-track injections can be performed at any intramuscular injection location, though the thigh and buttocks are the most common sites. Thigh (vastus lateralis muscle): Divide the upper thigh in thirds.
Skeletal muscle, with myofibrils labeled at upper right. 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 ...
Barrett's esophagus is a condition in which normal tissue lining of your esophagus – the tube that carries food from the mouth to the stomach – becomes more like the lining of your intestine ...
Passenger operations for Line Z, the interoceanic line, would begin in December 2023. Cargo operations for Line Z and Line FA officially began in September, "from this very moment" he claimed. [65] [66] However, works for Line FA and K were later delayed. On 24 January 2024, Ojeda Durán announced that Line FA will begin operations ...
Cylindrical coordinate system. A cylindrical coordinate system with origin O, polar axis A, and longitudinal axis L. The dot is the point with radial distance ρ = 4, angular coordinate φ = 130°, and height z = 4. A cylindrical coordinate system is a three-dimensional coordinate system that specifies point positions by the distance from a ...
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