Cardiac muscle tissue, like skeletal muscle tissue, has a striated appearance, because it too has an orderly arrangement of myofilaments. However, cardiac muscle differs from skeletal muscle in a number of important ways. Unlike the multinucleated skeletal muscle cells, cardiac muscle cells typically have a single, centrally located nucleus. Instead of one long cell forming the muscle fiber, in cardiac muscle many cells are linked together end to end to form a muscle fiber. Furthermore, these interconnected cardiac muscle cells form a branching network. Cardiac muscle cells are supplied by the part of the nervous system over which a person has no conscious control. Therefore, cardiac muscle is categorized as involuntary muscle because you cannot consciously regulate it. Cardiac muscle is the muscle tissue of the heart wall, which is responsible for the powerful pumping action that moves the blood through the circulatory vessels.