Activity 2C: Muscle Tissue💪🏻🔬
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Striated Muscle l.s. (Longitudinal Section)

This section reveals the organization of skeletal muscle fibers in parallel arrays, characterized by alternating light and dark bands called striations. It showcases the multinucleated muscle fibers with peripheral nuclei and the presence of myofibrils arranged in sarcomeres, the contractile units of muscle tissue.
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Striated muscle c.s. (Cross Section)

In this section, the muscle fibers are cut transversely, showing the circular arrangement of muscle fibers. It displays the striated appearance due to the overlapping arrangement of myofibrils within the muscle fibers. The central location of nuclei within the muscle fibers can also be observed.
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Mammal heart entire l.s. (Mammalian Heart Entire Longitudinal Section)

This section provides a longitudinal view of the entire mammalian heart, showcasing its internal structures such as the chambers (atria and ventricles), valves, and major blood vessels (aorta, pulmonary artery, pulmonary vein, and vena cava). It highlights the cardiac muscle tissue that makes up the myocardium, responsible for the heart’s pumping action.