📍Activity 2C: Muscle Tissue

Striated Muscle, c.s. 🔬
Under a microscope, cross-sections of skeletal muscle tissue are seen on the “Striated Muscle, c.s.” slide. The striated look of the slide is caused by the arrangement of myofilaments within muscle fibers, which alternates between dark and light bands. Muscle fibers are cylindrical in shape, and the cross-section shows that there are several nuclei at the periphery. The arrangement of sarcomeres, which are the functional units of muscle contraction and give birth to the striated pattern, is also visible.

Striated Muscle, l.s. 🔬
The “Striated Muscle, l.s.” slide showcases longitudinal sections of skeletal muscle tissue under a microscope. With a striated appearance similar to its cross-sectional counterpart, this slide offers a view along the length of muscle fibers. One can observe the parallel arrangement of myofibrils within the muscle fibers, contributing to the striations. Additionally, nuclei and connective tissue can be seen surrounding the muscle fibers, providing structural support and organization to the tissue.

Mammal Striated Muscle, c.s. 🔬
The “Mammal Striated Muscle, c.s.” slide exhibits cross-sections of striated muscle tissue from a mammalian source, likely skeletal muscle. Under the microscope, you can discern the characteristic striations formed by the arrangement of myofibrils within muscle fibers. The slide may reveal the presence of multiple nuclei positioned at the periphery of muscle fibers, a typical feature of skeletal muscle cells. Additionally, variations in fiber size and connective tissue distribution might be observed, providing insights into the tissue’s structural organization and function.

Striated Muscle 🔬
The “Striated Muscle” slide provides information about the arrangement of muscle fibres, myofibrils, and sarcomeres due to its distinctive striations. Examining this slide enables one to see how the myosin and actin filaments are arranged parallel within the muscle fibres, which is necessary for muscular contraction. Furthermore, multinucleated muscle cells and the surrounding endomysium connective tissue are visible. This slide aids in the study of muscle physiology and function by offering important information on the histological anatomy of skeletal muscle.