. Animal hormones; a comparative survey. Hormones. Fig. 2-4. The stellate ganglia of Sepia (A) and Loligo (B), and the epistellar body of Eledone (C). In (A) the giant fibres () and the stellate nerve () arise from nerve cells that are scattered throughout the ganglion; in (B) they are collected into a lobe (). In the octopus (C) there are no giant fibres, but instead there are neurosecretory cells () whose axons end blindly in the central space of the epistellar body (ep.); their secretion passes in the blood to the mantle muscles. A nerve (n.) to the epistellar body replac
. Animal hormones; a comparative survey. Hormones. Fig. 2-4. The stellate ganglia of Sepia (A) and Loligo (B), and the epistellar body of Eledone (C). In (A) the giant fibres () and the stellate nerve () arise from nerve cells that are scattered throughout the ganglion; in (B) they are collected into a lobe (). In the octopus (C) there are no giant fibres, but instead there are neurosecretory cells () whose axons end blindly in the central space of the epistellar body (ep.); their secretion passes in the blood to the mantle muscles. A nerve (n.) to the epistellar body replaces the preganglionic fibres () to the nerves in (A) and (B), and presumably controls the release of secretion in (C). (From Young, 1936). Neurosecretory systems of Crustacea There are four neurosecretory systems in crustaceans. Two of these have their nucleated cell bodies in the brain and in the^optic. 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 Jenkin, Penelope M. Oxford, New York, Pergamon Press
Size: 1802px × 1387px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjecthormones
