Cardiovascular system

Elastic Artery (aorta) (H&E stain)

Tunica intima (aorta)

media

Endothelium

Tunica media

Elastic artery

Vasa vasorum

media

adventitia

Masson’s trichrome stain (aorta)

media

Black=elastic lamina, Red=smooth muscleGreen=collagen

Tunica adventitia

Vasa vasorum

Elastic artery

Elastic artery (van Gieson stain) TUNICA MEDIA

Elastic lamina=black Connective tissue=pink

Tunica Media

Vein

Artery

Medium sized (Vein and Artery)

veinartery

Medium sized

Muscular artery (medium sized )

Muscular artery

Media

Intima

Adventitia

Muscular artery

media

adventitia

Internal elastic lamina

media

adventitia

IEL

LAMINA

MEDIA

External elastic laminae

IEL

Muscular artery

VEIN

Medium sized

MEDIA

ADVENTITIA

Medium sized vein

ARTERIOL

VENULE

Large sized (arteriole & venule)

Large Arteriole

Superficial Vein (Saphenous) (Masson’s trichrome stain)

media

Superficial Vein (Saphenous)

adventitia

Superficial Vein (Saphenous)

Microvasculature Vessels

HEART

Intercalated disk (special stain)

Intercalated disk

Intercalated disc

Purkinje Fibers

(PAS stain)

Ordinary cardiac muscle

Purkinje Fibers

Endocardium

Purkinje Fibers(PAS stain)

Purkinje Fibers(PAS stain)