MICROANATOMY

Detailed explanation-1: -Muscle fibers contain many myofibrils and contract by means of the sliding filament mechanism like skeletal muscle. In contrast to skeletal muscle, cardiac muscle fibers are shorter and interconnected which makes coordinate contractions possible without having individual innervation.

Detailed explanation-2: -Cardiac muscle cells They are around 0.02 mm wide and 0.1 mm (millimeters) long. Cardiomyocytes contain many sarcosomes, which provide the required energy for contraction. Unlike skeletal muscle cells, cardiomyocytes normally contain a single nucleus.

Detailed explanation-3: -Cardiac muscle fibres are thicker, ranging from 20 to 200 micrometres wide. Skeletal muscle is also arranged in bundles called fascicles, while the cardiac muscle is not. Cardiac muscles have a branching pattern that allows them to relax when they need to fill with blood (unlike skeletal muscles).

Detailed explanation-4: -There are three types of muscle tissue in the body: skeletal, smooth, and cardiac. Cardiac muscle is highly organized and contains many types of cell, including fibroblasts, smooth muscle cells, and cardiomyocytes. Cardiac muscle only exists in the heart.