Ronald A. Bergman, Ph.D., Adel K. Afifi, M.D., Paul M. Heidger,
Peer Review Status: Externally Peer Reviewed
Human, Zenker's fluid, phosphotungstic acid hematoxylin, 612 x.
Red blood cells: Abnormally clumped together in the lumen of the arteriole as a result of the fixation of the tissue.
Internal elastic lamina: Corrugated band due to the contraction of the circular smooth muscle. Prominent diagnostic structure found between intima and media.
Smooth muscle: Circularly arranged in the media. Note the presence of delicate elastic fibers in this layer. Although not shown, collagenous and reticular connective tissue fibers are also found in this layer.
Collagen: In the thick adventitia. Note the thin layer of slightly corrugated elastic fibers between the adventitia and media.
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