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Fig. 3. Sections taken at different levels showing representative Xmmp-9 mRNA expression in specific cells within the stage 37&38 larvae. A: Left lateral view of a stage 37&38 larva. Dotted lines indicate the locations of the cross sections shown in B, as indicated. B: Cross section through the eye. C: More posterior cross section through the neural tube. D: Cross section through the developing heart and liver diverticulum. E: More anterior section through the liver diverticulum. F: Cross section through the tail. Black arrowheads point to the endothelial cell bodies of the paired caudal veins. G: Section through the developing hindgut. Lateral (H), and ventral (I) views showing the cloaca and proctodeum of a stage 38 larva. Anatomical designations within the heart and blood vascular system follow those of Millard (1945, 1949) and Nieuwkoop and Faber (1956). Dorsal is located up in all sections. an, anus; ao, lumen of aorta; cv, lumens of caudal veins; fg, foregut lumen; hg, hindgut lumen; l, lens; ld, liver diverticulum/lumen; ms, mesenchyme expressing Xmmp-9; nc, notochord; nt, neural tube; rt, retina; sv, sinus venosus; tm, tail musculature; vf, ventral fin. Scale bar = 500 um in A. Scale bar in C applies to B and equals 50 um. Scale bar in G applies to D and equals 50 um. Scale bar in H applies to I and equals 100 um |
