MICROANATOMY

Detailed explanation-1: -A muscle fascicle is a bundle of skeletal muscle fibers surrounded by perimysium, a type of connective tissue. The endomysium, meaning within the muscle, is a wispy layer of areolar connective tissue that ensheaths each individual myocyte.

Detailed explanation-2: -Muscle fibres are arranged into individual bundles, each called a fascicle, within each skeletal muscle, by a middle layer of connective tissue called the perimysium.

Detailed explanation-3: -Function. In the heart specialized cardiac muscle cells transmit electrical impulses from the atrioventricular node (AV node) to the Purkinje fibers – fascicles, also referred to as bundle branches.

Detailed explanation-4: -Approximately 20–80 of these muscle fibers are grouped together in a parallel arrangement called a muscle fascicle or fiber bundle that is encapsulated by a perimysium, which is thicker than the epimysium enclosing each of the bundled muscle fibers.