Endomysium
Endomysium
Endomysium (pronunciation: en-doh-MY-see-um) is a term used in the field of Anatomy and Histology to describe a layer of connective tissue that ensheathes each individual muscle fiber, or myocyte. It is a component of the muscular system and plays a crucial role in muscle function and structure.
Etymology
The term 'Endomysium' is derived from the Greek words 'endo-', meaning 'within', and 'mys', meaning 'muscle'. Thus, it literally translates to 'within the muscle'.
Structure and Function
The Endomysium is composed primarily of reticular fibers, a type of thin, branching collagen fiber. It provides both structural support to the muscle fibers and a framework for capillaries and nerves to reach individual muscle cells. The Endomysium also plays a role in transmitting contractile forces from the muscle fibers to the tendon, which then transfers this force to the bone to facilitate movement.
Related Terms
- Perimysium: A sheath of connective tissue that groups muscle fibers into bundles or fascicles.
- Epimysium: The outermost layer of connective tissue surrounding a muscle.
- Sarcolemma: The cell membrane of a muscle cell.
- Myofibril: A basic rod-like unit of a muscle cell.
Pathology
In certain autoimmune diseases, such as Celiac Disease, antibodies may mistakenly target the Endomysium, leading to muscle weakness and other symptoms. This is often referred to as 'Endomysium antibody' in medical literature.
External links
- Medical encyclopedia article on Endomysium
- Wikipedia's article - Endomysium
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