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        | connective tissue ensheathing a bundle of muscle cells |  | 
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        | contractile unit of muscle |  | 
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        | thin recticular connective tissue surrounding each muscle cell |  | 
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        | plasma membrane of the muscle fiber |  | 
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        | a long filamentous organelle with a bandedappearance found within muscle cells |  | 
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        | actin-or myosin-containing structure |  | 
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        | cord of collagen fibers that attaches a muscle to a muscle or bone |  | 
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        | list three reasons why the connective tissue wrappings of skeletal muscle are important. |  | Definition 
 
        | 1) Provide a route for entry and exit of nerves and blood vessels that serve the muscle fibers. 2) provide strength to muscle as a whole 3) support and bind muscle fibers |  | 
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        | How does aponeurosis differ from a tendon structurally? |  | Definition 
 
        | Tendons are cord-like, whereas aponeurosis are sheet like. |  | 
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        | How are aponeurosis functionally similar to a tendon? |  | Definition 
 
        | They are similar because they both connect to a muscle. |  | 
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