muscular system; skeletal muscle tissue

22 terms by telfakaye

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branched

shape of cardiac cell

connective tissue

what attaches muscles to bone

fascicles

the whole muscle is composed of muscle cells (fibers) grouped into bundles called

epimysium

CT covering surrounding the whole muscle

perimysium

CT covering surrounding the fascicles

endomysium

CT covering surrounding the muscle cell

sarcolemma

plasma membrane of muscle cell

sarcoplasmic reticulum

endoplasmic reticulum in muscle cell

cytosol

intracellular fluid around organellea

terminal cisternae

part of endoplasmic reticulum-stores calcium ions

t-tubules

part of sarcolemma-carries action potential

triad

t-tubule + 2 terminl cisternae

myofilaments

contractile proteins that make up myofibrils

thin

myofibril composed of actin

thick

myofibril composed of myosin

a band

dark band in myofilament

i band

light band in myofilament

z disc

protein disc that anchors thin filaments and connects adjacent myofibrils

h zone

between a bands

m line

protein fibers connect neighboring thick filaments

sarcomere

contractile unit of a muscle cell

muscle, fascicle, muscle fiber, myofibril, myofilament

put in order from largest to smallest: fascicle, muscle fiber, myofilament, myofibril, muscle

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