By Leonard Muscatine
Coelenterate Biology: studies and New views highlights study components within which coelenterates are awfully priceless and fascinating experimental animals. It outlines the nation of data in coelenterate study and attracts realization to a couple of the difficult difficulties which are amenable for learn. Coelenterates provide priceless fabric for lots of degrees of inquiry—from the inhabitants and organismic to the mobile, subcellular, and molecular degrees. they're in particular beautiful animals for stories in developmental biology and behaviour.
The e-book starts via discussing cnidarians histology, targeting the sunshine and electron microscopy of cnidarian tissues. There are separate chapters at the skeletal procedure of cnidarians; the morphology, services, and chemistry of nematocytes; and some facets of the big topic of cnidarian improvement. the following chapters take care of cnidarian neurobiology, habit, locomotion, flotation, and dispersal; experimental experiences on algae-cnidarian symbioses; and coelenterate bioluminescence. The booklet concludes with a dialogue of the structures of coordination and worried method of ctenophores.
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Semal-Van Gansen, P. ( 1 9 5 1 ) . L e enidosome de l'hydre et le bouton urticant. Bull. CI. Sei. Acad. Roy. Belg. 3 7 , 6 5 0 - 6 6 4 . Skaer, R. J . , and Picken, L . E . R. ( 1 9 6 5 ) . T h e structure of the nematocyst thread and the geometry of discharge in Corynactis viridis Allman. Phil. Trans. Roy. Soc. London, Ser. Β 2 5 0 , 1 3 1 - 1 6 4 . Skaer, R. J . , and Picken, L . E . R. ( 1 9 6 6 ) . T h e pleated surface of the undischarged thread of a nematocyst and its simulation by models.
The plasma membrane at the tail's origin looks stiff er than the rest (Stagni and Lucchi, 1970) and this region may have a fuzzy coating of filaments (Afzelius and Franzen, 1971; Afzelius, 1971). My own unpublished observations on the trachymedusa, Liriope tetraphylla, are shown in Figs. 64 and 65. The anterior region is like hydra. The mitochondria have tubular instead of platelike cristae. I. C n i d a r i a n Histology 31 VIII. CNIDOBLASTS, CNIDOCYTES, AND NEMATOCYSTS A. Introduction Nematocysts are divided into nematocysts proper and spirocysts.
12. Muggiaea atlantica (siphonophore). Radial section of the velum. The thick layer at the upper left is composed of circular striated epitheliomuscular cells followed by a thin dark nutrient stream layer; next is a cross-layered myocyte layer, the radial part, at least, seemingly smooth. At the outside is a thin epithelial layer. Bar = 1 μηι. 54 DAVID Μ. CHAPMAN Figs. 14 and 1 5 . Electron microscopy of striated muscle. G, granule; M, mito chondrion; R, radial canal; S, seawater; T, tubule. Fig.