the vascular supply of the villiform processes in the pharynx of the soft-shelled turtle, trionyx sinensis japonicus. a scanning electron microscopic study of corrosion casts.following our observations of the fine structure of the pharyngeal villiform processes of the hibernating soft-shelled turtle, trionyx sinensis japonicus (yokosuka et al., 2000), this paper deals with a scanning electron microscope study of the resin casts of blood vessels supplying those processes. each villiform process contained arterioles and venules which ran in the axial portion of the process; capillaries formed a network at the periphery of the connective tissue core of the villus. in th ...200010885455
villiform processes in the pharynx of the soft-shelled turtle, trionyx sinensis japonicus, functioning as a respiratory and presumably salt uptaking organ in the water.some species of soft-shelled turtle have been known to use a conspicuous mass of villiform processes of the pharyngeal mucosa as an aquatic respiratory organ when staying underwater for prolonged periods, such as hibernation. using hibernating turtles, trionyx sinensis japonicus, the present study employed scanning electron microscopy to demonstrate for the first time the detailed morphology and distribution of these villiform processes. two types of processes, complex and simple, could be ident ...200010885454
differentiation of extracutaneous melanocytes in embryos of the turtle, trionyx sinensis japonicus.the present study investigates the mode of differentiation of neural crest-derived melanocytes in the embryos of the soft-shell turtle, trionyx sinensis japonicus. dopa reaction-positive melanoblasts were first detected in 10-day-old embryos. melanocyte differentiation in terms of pigmentation takes place from the day 16 of development. melanin pigments were found in the dorsal integument as well as in various extracutaneous tissues such as skeletal muscle, dorsal aorta, peritoneum, blood vessel ...19911816548
the structure of the ileofibularis muscle in the turtle trionyx sinensis.the ileofibularis muscle of the turtle trionyx sinensis was examined by light and electron microscopy. acetylcholinesterase staining showed an "en grappe" type of terminal. the muscle showed succinic dehydrogenase activity with three different types of fibers. the fibers appeared fibrillar type under the electron microscope. neuromuscular junctions showed the presynaptic portion containing clear vesicles and mitochondria, whereas the postjunctional portion showed only few junctional folds.19873619598
the structure of the pigment cells in the turtle trionyx sinensis.a light and transmission electron microscopic study of the pigment cells (chromatophores) revealed the presence of three types of cells, namely: melanophores, xanthophores or erythrophores, and iridophores. the melanophores contained eumelanin containing organelles, the melanosomes and iridophores showed reflecting platelets, whereas, the xanthophores contained pterinosomes. quantitatively melanophores appeared in large numbers and were widely distributed, ranging from the skin to many internal ...19863813821
epiplexus cells in the embryos of the turtle, trionyx sinensis.the epiplexus cells in the embryos of the turtle, trionyx sinensis were examined in scanning and transmission electron microscopy. although the cells showed diverse morphological forms, the majority of the cells however had a stellate cell body each with 3-5 radiating long processes with secondary processes terminating on the ventricular surface of the choroid epithelial cells. the cell body was relatively smooth. occasional epiplexus cells displayed blebs on their cell bodies and processes. in ...19854084004
[studies on soft-shelled turtles. i. effects of various fractionated extracts from trionyx sinensis wiegmann on the isolated mesenteric veins of mice]. 19846527229
adenohypophysial cell-types in the pituitary gland of the soft-shelled turtle, trionyx sinensis. i. seasonal using various staining techniques, two acidophilic and three basophilic cell-types have been distinguished in the pars distalis of trionyx sinensis. seasonal fluctuations in their cytoplasmic granulation, cell and nuclear size have been compared with seasonal patterns of activity in the gonads, adrenals and thyroid. on the basis of the results, specific functions have been ascribed to each cell-type. basophils 1 activity closely parallels the seasonal thyroid cycle. basophils 2 are probably f ...1976183889
Displaying items 201 - 208 of 208