2. Ainât âYou ainât gonna believe that âainâtâ ainât at the top of the list, but it ainât.â. You would think ainât would be a the top of the list, but youse will see soon why not. Donât get me wrong, this is a hall of fame non-word. It gets a point for being a contraction.
Peripheral nerves have three layers of connective tissue: Epineurium â is the outermost layer of connective tissue that is continuous with the dura mater. It also includes the connective tissue in between any fascicles (bundles) within the nerve. Perineurium â is the connective tissue sheath that surrounds a fascicle of axons. Endoneurium â is the delicate connective tissue fibers that surround individual axons. Subspecialty
Connective tissue from this outer sheath extends into the body of the muscle, subdividing it into columns, or fascicles (these are the strings in stringy meat). Each of these fascicles is thus surrounded by its own connective tissue sheath, which is known as the perimysium (peri = around).Dissection of a muscle fascicle under a microscope reveals that it, in turn, is composed of many muscle fibers, or myofibers.ach is surrounded by a plasma membrane, or sarcolemma, enveloped by a thin connective tissue layer called an endomy-sium (fig. 12.1). Since the connective tissue of the tendons, epimysium, perimysium, and endomysium is continuous, muscle fibers do not normally pull out of the tendons when they contract.