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A&PI -Ch4

Tissue the Living Fabric - Muscle Tissue

highly cellular, well-vascularized tissues that are responsible for most types of body movement muscle tissue
one of the individual filaments of actin or myosin that make up a myofibril myofilaments
bring about movement or contraction in all cell types actin or myosin
types of muscle tissue are skeletal, cardiac, and smooth
composed of cylindrical multinucleate cells with obvious striations; muscles attached to skeleton; voluntary muscle skeletal muscles
skeletal muscles are also called muscle __ fibers
long, cylindrical cells that contained many nuclei w/obvious banding/straited skeletal muscle cells
appearance, of skeletal muscles, reflects __ __ of their myofilaments precise alignment
generally multinucleate & are branching cells that fit together tightly at intercalated discs cardiac muscle cells
specialized connections btwn myocardial cells containing gap junctions & desmosomes intercalated discs
no visible striations; spindle shaped & contain one centrally located nucleus smooth muscle cells
muscles found in walls of hollow organs (other than heart) that act to squeeze substances through organs by alternately contracting & relaxing smooth
muscle whose contractions help propel blood through blood vessels to all parts of body, found only in heart cardiac
muscle packaged by CT sheets into organs, that are attached to bones & skeleton; form fleshy part of body skeletal
muscle under strict nervous control; skeletal muscle voluntary
muscle that cannot ordinarily be controlled voluntarily (e.g., smooth & cardiac muscle) involuntary
located in skeletal muscles attached to bones, or occasionally skin skeletal muscles
located in walls of heart cardiac muscles
located mostly in walls of hollow organs smooth muscles
Created by: lfrancois



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