GENERAL HISTOLOGY

Detailed explanation-1: -Intercalated discs are part of the cardiac muscle sarcolemma, so they also contain gap junctions for depolarization between muscle fibers and desmosomes that hold the fibers together during cardiac muscle contraction (Fig.

Detailed explanation-2: -Intercalated discs are located at the longitudinal ends of cardiomyocyte to form cell–cell coupling critical in propagation of action potentials. Both Cx43 gap junctions and voltage-gated sodium channels are present at intercalated discs.