The lecturer in the College of Education for Pure Sciences / Department of biology, Assistant Prof. Dr. (Muhammad Wissam Haidar), obtained the acceptance of publishing a scientific article entitled (The histological structure of muscles in fish) by the Scientific Articles Committee at the Presidency of the University of Karbala after the article fulfilled all publishing conditions. (Professor Dr. Muhammad Wissam Haidar) stated that the muscle tissue in fish represents the largest part of the body mass compared to the body mass in other vertebrates, as it constitutes a percentage between (30-60%) of the body mass in the fish, and represents the organ The locomotor muscle is made up of fast and slow muscles, as it extends on both sides of the body from the beginning of the head to the tail. Muscles in fish are composed of a series of muscle masses, and these pieces are separated by sheets of connective tissue called muscular septa. The fibers of these blocks are somewhat arranged parallel to the axis of the body. There is a clear difference between the muscles of fish and other vertebrates, as their muscle fibers in fish are separated from each other and are distinguished With continuous growth that leads to an increase in its size during its life, and the classification of muscle fibers depends on several bases, including: color, location, diameters of muscle fibers, muscle proportions in each type, blood supply, and effectiveness. There are two types of muscle fibers: red and white, and a third intermediate muscle type called pink muscle is found in most types of fish except for salmon fish. Active fish have an efficient muscular system; To withstand and resist various life and environmental factors, unlike fish with little activity, which are of little movement and static within a specific environmental area.
