. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. N B Figure 1. (A) Dorsal view of the dorsal abdominal vasculature in umericanus. Ttie dorsal abdominal aorta (DAA) lies along the dorsal surface of the hindgut (Gut). Within each of the first five abdominal segments, a pair of lateral abdominal arteries (LAA) branch off the DAA at roughly right angles. The bifurcating pair of arteries at the posterior margin of the fifth segment are homologous to the more anterior LAAs. (B) The innervation patterns of the LAA valves. The valve nerves (N) approach each valve in conne
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. N B Figure 1. (A) Dorsal view of the dorsal abdominal vasculature in umericanus. Ttie dorsal abdominal aorta (DAA) lies along the dorsal surface of the hindgut (Gut). Within each of the first five abdominal segments, a pair of lateral abdominal arteries (LAA) branch off the DAA at roughly right angles. The bifurcating pair of arteries at the posterior margin of the fifth segment are homologous to the more anterior LAAs. (B) The innervation patterns of the LAA valves. The valve nerves (N) approach each valve in connective tissue along the anterior edge of each LAA. (C) A dorsal view of the junction of one pair of segmental lateral abdominal arteries with the dorsal abdominal aorta. The dorsal wall of the DAA has been cut longitudinally and the flaps have been pinned back to reveal the lateral abdominal artery valves (Valve). A and B indicate the sites of nerve stimulation proximal and distal to the point where the incoming nerve bifurcates. Valve. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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