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Axial Muscles

QuestionAnswer
Fibrous envelopes Endomysium, fascile, perimysium, epimysium
Tendons Strong, tough cord
Aponeurosis Broad flat sheet
Tendon sheaths Double-walled tubes
Fascia Superficial and deep
Parallel fibers Long straplike, varied in length
Convergent Radiating vesicles
Pennate Featherlike Unipennate, bipennate, multipennate
Fusiform Parallel in belly, then converge at one or both ends
Spiral twisted fibers
Circular Circle body tubes or openings
Origin More stationary when muscle contracts
Insertion Moves when muscle contracts
Four parts level system Rigid bar (bone) Fulcrum (F) (joint) around which the rod moves Load (L) that is moved Pull (P) that produces movement (muscle contraction)
First-class levers Fulcrum lies between pull and load Generally, serve as levers of stability
Second-class levers Load lies between fulcrum and joint at which pull is exerted Controversial whether human body has them
Third-class levers Pull is exerted between fulcrum and load Most common type in body
Created by: user-1881283
 

 



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