GENERAL HISTOLOGY

Detailed explanation-1: -Cardiac muscle cells (cardiomyocytes) are striated, branched, contain many mitochondria, and are under involuntary control. Each myocyte contains a single, centrally located nucleus and is surrounded by a cell membrane known as the sarcolemma.

Detailed explanation-2: -The cardiac muscle cell has one central nucleus, like smooth muscle, but it also is striated, like skeletal muscle. The cardiac muscle cell is rectangular in shape. The contraction of cardiac muscle is involuntary, strong, and rhythmical.

Detailed explanation-3: -Smooth muscle cells are responsible for involuntary contractions and are found in the walls of blood vessels and hollow organs such as the gastrointestinal tract, uterus, and bladder.