Sarcoplasm is the cytoplasm of a muscle cell, specifically found in skeletal and cardiac muscle fibers. It contains various organelles, including myofibrils, which are essential for muscle contraction. The sarcoplasm also houses important substances like glycogen, which provides energy, and myoglobin, a protein that stores oxygen for muscle use. In addition to these components, sarcoplasm plays a crucial role in the overall function of muscle tissue. It helps maintain the environment necessary for muscle contraction and relaxation, ensuring that muscles can respond effectively to signals from the nervous system, such as those from the central nervous system.