slide 88, elastic artery (aorta), (10x obj.) ti tm ta elastic fibers
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Slide 88, elastic artery (aorta), (10x obj.)Slide 88, elastic artery (aorta), (10x obj.)TITI
TMTM
TATA
elastic fiberselastic fibers
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Slide 36, elastic artery (aorta), trichrome (10x obj.)Slide 36, elastic artery (aorta), trichrome (10x obj.)
TITI
TMTM
TATA
elastic fiberselastic fibers
NOT vasa NOT vasa vasorumvasorum
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Slide 36, elastic artery (aorta), trichrome (40x obj.)Slide 36, elastic artery (aorta), trichrome (40x obj.)
TMTM
TATA
elastic fiberselastic fibers
vasa vasorum
vasa vasorum
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Slide 30, muscular artery (4x obj.)Slide 30, muscular artery (4x obj.)
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Vessel TunicsA. Tunica Intima
•endothelium•subendothelium
connective tissuesmooth muscle(longitudinal fibers)
•internal elastic lamina
B. Tunica Media•vascular smooth muscle•external elastic lamina(circular fibers)
C. Tunica Adventitia•connective tissue(longitudinal)
Slide 30, muscular artery (40x obj.)Slide 30, muscular artery (40x obj.)
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Slide 92, muscular artery w/ intimal thickening (40x obj.)Slide 92, muscular artery w/ intimal thickening (40x obj.)
Vessel TunicsA. Tunica Intima
•endothelium•subendothelium
connective tissuesmooth muscle(longitudinal fibers)
•internal elastic lamina
B. Tunica Media•vascular smooth muscle•external elastic lamina(circular fibers)
C. Tunica Adventitia•connective tissue(longitudinal)
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Slide 95, muscular artery, trichrome (4x obj.)Slide 95, muscular artery, trichrome (4x obj.)
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Slide 95, muscular artery, trichrome (40x obj.)Slide 95, muscular artery, trichrome (40x obj.)
tunica media
internal elastic lamina
elastic fibers
tunica tunica adventitiaadventitia
external elastic lamina
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Slide 95, medium vein, H&E (4x obj.)Slide 95, medium vein, H&E (4x obj.)
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Slide 95, medium vein, H&E (10x obj.)Slide 95, medium vein, H&E (10x obj.)
Tunica media• 3-15 layers of VSMCs• no external elastic lamina
•Tunica adventitiaTunica adventitia• thicker than tunica mediathicker than tunica media• larger veins have larger veins have
longitudinal smooth longitudinal smooth muscle in adventitiamuscle in adventitia
• Tunica intima • endothelium• subendothelium• IEL generally not evident
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Slide 95, medium vein, trichrome (4x obj.)Slide 95, medium vein, trichrome (4x obj.)
tunica adventitia
tunica media
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Slide 95, medium vein, trichrome (10x obj.)Slide 95, medium vein, trichrome (10x obj.)
tunica adventitiatunica adventitia
tunica mediatunica media
elastic fiberselastic fibers
Note: IEL sometimes evident w/ trichrome stain
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Arterioles•Tunica intima
very thin subendothelial layergenerally lacking distinct internal elastic lamina
•Tunica media1-3 layers of VSMCsno external elastic lamina
•Tunica adventitiathin and ill-defined
Venules•Tunica intima
endotheliumpericytes
•Tunica media1-2 sparse layers of VSMCsno external elastic lamina
•Tunica adventitiathicker than tunica media
Slide 95, arteriole and venule, H&E (40x obj.)Slide 95, arteriole and venule, H&E (40x obj.)
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Slide 95, arterioles and venules, trichrome (40x obj.)Slide 95, arterioles and venules, trichrome (40x obj.)
arteriole
venulevenule
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Slide 95, arteriole and venule (?), trichrome (40x obj.)Slide 95, arteriole and venule (?), trichrome (40x obj.)
arteriole?
venule?
Remember, the change in vessel size is gradual, so you’ll find intermediate sizes. To make classification easy, focus on vessels that are clearly one type or another.
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Slide 95, arteriole and venule (?), trichrome (40x obj.)Slide 95, arteriole and venule (?), trichrome (40x obj.)
arteriole?(sectioned obliquely)
venule?
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Slide 95, small vein & Slide 95, small vein & artery, H&E (40x obj.)artery, H&E (40x obj.)
veinvein
arteryartery
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Slide 95, small vein & Slide 95, small vein & artery, trichrome (40x obj.)artery, trichrome (40x obj.)
veinvein
arteryartery
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Slide 30, Slide 30, lymphaticlymphatic vessel (10x obj.) vessel (10x obj.)
Note number of white blood cells in lumen
valve
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Slide 40, trachea (10x obj.)Slide 40, trachea (10x obj.)
Look in this layer for arterioles and venules
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Slide 40, trachea (40x obj.)Slide 40, trachea (40x obj.)
venulevenule
arteriolearteriole
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Slide 102, capillaries in myocardium (40x obj.)Slide 102, capillaries in myocardium (40x obj.)
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Slide 98, H&E (orientation)Slide 98, H&E (orientation)
epicardiumepicardium
ventricular myocardiumventricular myocardium
papillary musclepapillary muscle
A-V valve leafletA-V valve leaflet
coronary vessels
atrial m
yocardium
atrial m
yocardium
Look under endocardium to find Purkinje fiberschorda tendinae
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Slide 98, H&E, (20x obj.)Slide 98, H&E, (20x obj.)
endocardiumendocardium
Purkinje fibersPurkinje fibersin “subendocardium”in “subendocardium” (note perinuclear space (note perinuclear space and large fiber size)and large fiber size)
cardiac musclecardiac muscle
myocardiummyocardium
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Slide 98, H&E (orientation)Slide 98, H&E (orientation)
epicardiumepicardium
ventricular myocardiumventricular myocardium
papillary muscle
A-V valve leafletA-V valve leaflet
coronary vessels
atrial m
yocardium
atrial m
yocardium
Look under endocardium to find Purkinje fibers
chorda tendinae
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Slide 98, trichrome (20x obj.)Slide 98, trichrome (20x obj.)
endocardium
Purkinje fibers Purkinje fibers (note perinuclear space (note perinuclear space and large fiber size)and large fiber size)
cardiac musclecardiac muscle
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Slide 98, trichrome (20x obj.)Slide 98, trichrome (20x obj.)
papillary muscle
A-V valve leafletA-V valve leaflet
chorda tendinae
to atrium to ventricle
Note that distribution of elastic fibers faces blood flow.
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Slide 99, H&E (orientation)Slide 99, H&E (orientation)
look here for A-V bundle of His
ventricular myocardiumventricular myocardium
atrial myocardiumatrial myocardium
aortic valve aortic valve leafletleaflet
A-V valve A-V valve leafletleaflet
cardiac skeleton
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Slide 99, H&E (4x obj.)Slide 99, H&E (4x obj.)
A-V bundle of His
ventricular myocardiumventricular myocardium
cardiac skeleton
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Slide 99, H&E (20x obj.)Slide 99, H&E (20x obj.)
A-V bundle of His
cardiac skeleton
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Slide 99, trichrome (orientation)Slide 99, trichrome (orientation)
look here for A-V bundle of His
ventricular myocardiumventricular myocardium
atrial myocardiumatrial myocardium
aortic valve aortic valve leafletleaflet
A-V valve A-V valve leafletleaflet
cardiac skeleton
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Slide 99, trichrome (4x obj.)Slide 99, trichrome (4x obj.)
A-V bundle of His
ventricular myocardiumventricular myocardium
cardiac skeleton
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Slide 99, trichrome (20x obj.)Slide 99, trichrome (20x obj.)
A-V bundle of His
cardiac skeleton
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Slide 100, H&E (orientation)Slide 100, H&E (orientation)
ventricular myocardiumventricular myocardium
atrial atrial myocardiummyocardium
aortic valve aortic valve leafletleaflet
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Slide 100, Weigert (orientation)Slide 100, Weigert (orientation)
ventricular myocardiumventricular myocardium
atrial atrial myocardiummyocardium
aortic valve aortic valve leafletleaflet
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Slide 100, Weigert (4x obj)Slide 100, Weigert (4x obj)
to ventricle
to aorta
Note that distribution of elastic fibers faces blood flow.
aortic valve aortic valve leafletleaflet
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Slide 100, Weigert (4x obj)Slide 100, Weigert (4x obj)
aortic side of leaflet ventricular side of leaflet
aortic valve aortic valve leafletleaflet
Note that distribution of elastic fibers faces blood flow.
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Slide 102, H&E (orientation)Slide 102, H&E (orientation)
ventricular myocardiumventricular myocardium
aortic valve aortic valve leafletleaflet
epicardium
epicardium
coronary vessels
atrial atrial myocardiummyocardium