Figure 3: Scanning electron microscopic micrographs of carotid arteries in the age groups (G1, G2, and G3). At (a and b) micrographs uniform size fenestrations and smooth surfaced IEL( Internal elastic lamina) of G1, G2 groups is shown. (c); Irregular fenestrations of IEL in G3 group. Thin arrows: Fenestrae