what attaches cardiac muscle fibers together
No. Cardiac muscles are attached to the pericardium-a layer of tissue that surrounds the heart and the Great Vessels. The sac rests on the diaphragm and is connected b â¦ y various bits of connective tissue to the thoracic cavity.t each end of the muscle the collagen fibers of the epimysium, perimysium and endomysium come together to form a bundle known as a tendon. If they form a broad sheet it is ca â¦ lled an aponeurosis. I think tendon is what you're looking for. 5 people found this useful.