Fig. 3. (A-D) Light micrographs of consecutive sections through a segmental artery (sg.a.) taken 8 µm apart, showing the connection between interarterial anastomoses (iaas) and secondary vessels (SV). The vessel path from the coiled region of iaas (arrowheads in D) is denoted by stippled arrows in A. Note the numerous nerve bundles (Ne) in association with secondary vessels. Scale bar, 100 µm. Lissamine Fast Red, 2 µm section.