Large vein
The tunica adventitia of large veins forms the thickest portion of the wall and completely fills the field of this image of the vena cava. Tunica adventitia is composed primarily of connective tissue, but often contains longitudinally orientated smooth muscle fibers as well. 400x
Location of image
The tunica adventitia of large veins forms the thickest portion of the wall and completely fills the field of this image. The tunica adventitia is composed primarily of connective tissue, but often contains longitudinally orientated smooth muscle fibers as well, as seen in this image of the vena cava. 400x
Connective tissue
The tunica adventitia of large veins forms the thickest portion of the wall and completely fills the field of this image. The tunica adventitia is composed primarily of connective tissue, but often contains longitudinally orientated smooth muscle fibers as well, as seen in this image of the vena cava. 400x
Longitudinal smooth muscle
The tunica adventitia of large veins forms the thickest portion of the wall and completely fills the field of this image. The tunica adventitia is composed primarily of connective tissue, but often contains longitudinally orientated smooth muscle fibers as well, as seen in this image of the vena cava. 400x
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