. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 255. — Air bladder of Megalops cyprinoides, after de Beaufort, a, anus; b, air bladder; d, pneumatic dust leading from the oesophagus; I, ligament; p, anterior part of bladder extending to skull. ately below the vertebras and excretory organs (mesonephroi). In some instances it extends the whole length of the body cavity and (clupeids) may even send diverticula into the head. In other species it may be much shorter. In development it arises as a diverticulum of the alimentary canal (fig. 209), and in the g
. Comparative anatomy of vertebrates. Anatomy, Comparative; Vertebrates -- Anatomy. FIG. 255. — Air bladder of Megalops cyprinoides, after de Beaufort, a, anus; b, air bladder; d, pneumatic dust leading from the oesophagus; I, ligament; p, anterior part of bladder extending to skull. ately below the vertebras and excretory organs (mesonephroi). In some instances it extends the whole length of the body cavity and (clupeids) may even send diverticula into the head. In other species it may be much shorter. In development it arises as a diverticulum of the alimentary canal (fig. 209), and in the ganoids and one group of teleosts (physostomi) it is connected with the digestive tract throughout A b oe. FIG. —-Swim-bladders of physostomous fishes; A, pickerel (Esox); B, carp (Cypri- nus); and C, eel (Anguilla) after Tracy. b, swim-bladder; d, duct; g, red gland; oe, oesophagus. life by the pneumatic duct. This usually empties into the cesophagus, but it may connect with the stomach. In most teleosts, however, the duct becomes closed at an early date and the bladder loses its connex- ion with the digestive tract (physoclisti). The swim bladder is usually unpaired (paired in most ganoids) and may be simple or divided into two (rarely three) connecting sacs (fig. 256). It is usually regular in outline, but diverticula of all kinds are. 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 Kingsley, J. S. (John Sterling), 1854-1929. Philadelphia, P. Blakiston's son & co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
