The tissue shown in the question is cardiac muscle tissue. Cardiac muscle tissue is a specialized type of muscle tissue found only in the heart. It is responsible for the contraction and relaxation of the heart, allowing it to pump blood throughout the body. Cardiac muscle tissue is striated and involuntary, meaning it is under unconscious control. It contains intercalated discs, which allow for synchronized contractions of the heart muscle cells. Overall, the presence of striations, branching fibers, and intercalated discs in the image suggests that it is cardiac muscle tissue.