Scanning electron micrographic observations of renal arteries of goat and pig which revealed a thin tunica intima enveloped by packed layer of smooth muscle cells in media in both species. Endothelium was wavy in outline on internal aspect of renal arteries in goats and pigs. It presented cushion like foldings which were aligned across the longitudinal axis of the artery. Outer parts of tunica media were anchored by fine collagen fibrils and elastic fibers to the collagen tissue in adventitia. In case of pig, tunica adventitia of renal arteries was relatively thicker than that of the goat. Internal diameter of pig renal artery was more than the goat renal arteries. Internal elastic membrane was comparatively thin wavy structure with invaginations into the tunica media. | Scanning electron microscopic features of the renal arteries in Indian goat (Capra hircus) and Pig (Suscrofa domesticus)
