the branching point of the afferent arteriole is characterized by ( i ) the formation of a right angle with the parent vessel , ( ii ) circularly arranged smooth muscle cells of the tunica media , ( iii ) additional circularly arranged smooth muscle cells intercalated between endothelium and tunica media , and ( iv ) a collar-like arrangement of several large endothelial cells with elaborate marginal folds and abundant myoendothelial junctions .
C0014257
endothelium
C0225336
endothelial cells