Download - Muscle tissue
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SmoothSmooth musclemuscle (HE)(HE)
SkeletalSkeletal musclemuscle ((crosscross sectionsection HE)HE)
SkeletalSkeletal musclemuscle ((longitudinallongitudinal sectionsection HE)HE)
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SmoothSmooth musclemuscle HM, HM, 40x 40x (HE)(HE)SmoothSmooth musclemuscle cellcell ((oneone nucleusnucleus, , thinthin, , bobbinbobbin shapeshape))The The cellscells arrangedarranged inin fasciculifasciculi..The The nucleusnucleus is is localisedlocalised inin thethe centre of centre of thethe cellcell. . ThereThere areare no no striatedstriated
Smooth muscle nucleus
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The The functionalfunctional unit of unit of itit is is thethe muscularmuscular fibrefibreThereThere is a is a fusionfusion of of thethe myoblastmyoblast cellscells duringduring thethe ontogenesisontogenesisThe The numbernumber of of nucleinuclei maymay be more be more thanthan 100100
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Epimysium
EndomysiumPerimysium
(Cohnheim field)
SkeletalSkeletal musclemuscle crosscross sectionsection, 20x (HE), 20x (HE)
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SkeletalSkeletal musclemuscle crosscross sectionsection, 40x (HE), 40x (HE)
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The The bandsbands, , whichwhich areare dyeddyed darkdark, show a , show a doubledouble refractionrefraction of of lightlight. . ThatThat sswhywhy thesethese areare AnisotropesAnisotropes (A)(A)The The bandsbands, , whichwhich areare dyeddyed lightlight, , havehave singlesingle refractionrefraction of of lightlight IsotropesIsotropes (I)(I)ThereThere is a is a thinthin line line inin thethe middlemiddle of of thethe II--bandband, , whichwhich is is calledcalled ZZ--bandbandThereThere is a is a lighterlighter line line inin thethe middlemiddle of of thethe AA--bandband, , whichwhich is is calledcalled HH--bandbandand int he and int he middlemiddle of of thisthis lighterlighter line line therethere is a is a darkdark line, line, thethe MM--line.line.The The II--bandband becomesbecomes shortershorter whenwhen thethe musclemuscle contractscontracts
ThoseThose contractilecontractile elementselements whichwhich show show striatedstriated patternpattern is is calledcalledmyofibrilsmyofibrils..The The placeplace whichwhich is is betweenbetween twotwo ZZ--bandsbands isis calledcalled sarcomersarcomerThe The myofibrillummyofibrillum consistsconsists of of myofilamentsmyofilaments..
thinthin (9 nm (9 nm actinactin))
thickthick (12(12--15 nm 15 nm myosinmyosin))
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HarHaráántcsntcsííkolt izom HM, 40x (HE)kolt izom HM, 40x (HE)
Muscle cell nuclei
Striated pattern
Fibrocyte nucleus
SkeletalSkeletal musclemuscle ((longitudinallongitudinalsectionsection, 40x (HE), 40x (HE)