Normal Artery
Normal Artery

Higher power of previous view showing a layer of endothelial cells lining the lumen
The dark, red, wavy line is the elastica interna.
The intima consists of the endothelial cells and the very thin space between them and the internal elastic lamina.
It is more substantial in arteries from adults.
Note the elongate parallel nuclei of the smooth muscle in the media.
(Description By:T.V. Rajan, M.D. )
(Image Contrib. by:T.V. Rajan, M.D. UCHC )