Anatomy and Cell Biology 3309 Lecture Notes - Lecture 15: Anterior Grey Column, Glycogen, Nuclear Membrane
3 Dec 2014
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Note: the white gaps between muscle fibers is artifact created during preparation: nuclei are just below the plasma membrane, on the periphery, banding pattern broad light band, thin dark band, broad light band, etc, from dark band to dark band is a sarcomere (contractile unit, single long cell is multinucleated (a syncytium) that can run the length of the muscle belly, chains of sarcomeres form myofibrils, many myofibrils together form myofibers (the actual muscle cell, each myofiber is wrapped in endomysium loose ct, myofibers are grouped together into fascicles which are wrapped in perimysium loose ct (cid:224) carries blood vessels and nerves, many fascicles are grouped together to form the muscle which is then wrapped in epimysium dense irregular ct (cid:224) can withstand forces in multiple directions, all 3 ct coverings come together at the ends of the muscle to form the tendons to withstand forces in a single direction.
