09/03/2025
📌Macroscopic Structure of Muscle
➡️Skeletal muscle, as we know it (e.g., biceps brachii), is a collection of muscle cells, nerves, connective tissue, and blood vessels. Each muscle cell is known as a muscle fiber.
➡️Muscle fibers are cylindrical, arranged parallel to each other, and run through the entire length of the muscle. The fibers are held in place by connective tissue, which surround individual fibers, bundles of muscle fibers and, finally, the entire muscle.
➡️It is the connective tissue that attaches muscle to the periosteum of bones and conveys the force generated by the muscle to the bone, across one or more joints.
➡️Other than the connective tissue surrounding individual fibers, bundles of fibers, and the entire muscle, connective tissue (fascia) separates muscle from the skin (superficial fascia or subcutaneous layer) and holds groups of muscles with similar functions together (deep fascia).
➡️The connective tissue that surrounds an individual fiber is the endomysium .
➡️Fascicles are bundles of muscle fibers surrounded by additional connective tissue, the perimysium.
➡️The perimysium attaches adjacent fascicles together in addi-ltion to carrying blood vessels and nerves to the muscle fibers.
➡️ The whole muscle is surrounded by connective tissue called the epimysium. This connective tissue (part of the deep fascia) separates muscles from each other and the surrounding organs.
➡️ The epimysium, in turn, is continuous, with a rope-like connective tissue—the tendon or connective tissue sheet—aponeurosis.
➡️The tendon or aponeurosis ultimately weaves intimately with the periosteum of bone, attaching the muscle.
➡️By this interconnection of connective tissue, the power generated by the contraction of individual muscle fibers is conveyed to the bone.
➡️ The fleshy part of the muscle that lies between the connective tissue that attaches it to both ends of the bone is known as the belly of the muscle.
🚫⛔Do Not Copy. Only Share or Repost.⛔🚫