Circulatory System

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Tunica Intima

Endothelial cells lining the lumen of the vessel under a thin layer of connective tissue. Being very thin, we observe the Internal Elastic Lamina (separating Tunica Intima of the Tunica Media) and External Elastic Lamina (separating the Tunica Media of the Tunica Adventitia), both laminas are made of elastic fibers.

LV: Lumen of the vessel

IEL: Internal Elastic Lamina

TM: Tunica Media

EEL: External Elastic Lamina