Ends of the A bands are darkest because they are where the thick and thin filaments overlap.
- The sarcomere, which is composed of a complex mesh of thick filaments, thin filaments, and a massive protein called titin, is the fundamental contractile unit of both striated and cardiac muscle.
- Up until the Z discs get close to the thick filaments, thin filaments are drawn toward the centre of the sarcomere by the thick filaments.
- By magnifying an object twice with the objective and oculus lenses, a microscope may magnify the vision of an object. It takes place as follows: A specimen is illuminated by light coming from below. A extremely close-positioned objective lens creates a "genuine image" of the specimen.
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