Question

Need to know A and B

A. describe in detail the basic structure of a muscle organ.

B. be sure to explain how endomysium, perimysium and epimysium play a role in muscle contraction. Explain how the connect to muscle fibers as well as to the tendon. think of how the tendon runs through the muscle tissue and breaks up into the endo, peri, and epimysium

Answer 1

A. Basic structure of a muscle organ:

Each organ or muscle consists of skeletal muscle tissue, connective tissue, nerve tissue and blood or vascular tissue. Each muscle is surrounded by a connective tissue sheath called the Epimysium. Fascia, connective tissue outside the Epimysium, surrounds and separates the muscles.

B. Each muscle is wrapped in a sheath of connective tissue called Epimysium, which allows a muscle to contract and move powerfully while maintaining its structural integrity. Inside each skeletal muscle, muscle fibers are organised into bundles, called fascicles, surrounded by a middle layer of connective tissue called the Perimysium. It allows the nervous system to trigger a specific movement of a muscle by activating a subset of muscle fibres within a fascicle of the muscle. Inside each fascicle, each muscle fiber is encased in a thin connective tissue layer of collagen and reticular fibers called Endomysium. It surrounds the extracellular matrix of the cells and plays a role in transferring force produced by the muscle fibres to the tendons.

In skeletal muscles that work with tendons to pull on bones, collagen in the 3 connective tissue layers interwines with the collagen of a tendon. At the other end of the tendon, it fuses with the periosteum coating the bone. The tension created by contraction of the muscle fibres is then transferred through the connective tissue layers, to the tendon,and then to periosteum to pull on the bone for movement of the skeleton.