The vascular supply of the villiform processes in the pharynx of the soft-shelled turtle, Trionyx sinensis japonicus. A scanning electron microscopicstudy of corrosion casts

Citation
H. Yokosuka et al., The vascular supply of the villiform processes in the pharynx of the soft-shelled turtle, Trionyx sinensis japonicus. A scanning electron microscopicstudy of corrosion casts, ARCH HIST C, 63(2), 2000, pp. 193-198
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Medical Research Diagnosis & Treatment
Journal title
ARCHIVES OF HISTOLOGY AND CYTOLOGY
ISSN journal
0914-9465 → ACNP
Volume
63
Issue
2
Year of publication
2000
Pages
193 - 198
Database
ISI
SICI code
0914-9465(200005)63:2<193:TVSOTV>2.0.ZU;2-0
Abstract
Following our observations of the fine structure of the pharyngeal villifor m processes of the hibernating soft-shelled turtle, Trionyx sinensis japoni cus (YOKOSUKA et al., 2000), this paper deals with a scanning electron micr oscope study of the resin casts of blood vessels supplying those processes. Each villiform process contained arterioles and venules which ran in the ax ial portion of the process; capillaries formed a network at the periphery o f the connective tissue core of the villus. In the distal portions of the v illus, the capillaries increased markedly in their caliber to form sinusoid al capillaries. Such a vascular architecture supports the view that the vil liform processes serve in the aquatic respiration of the soft-shelled turtl e. The casts indicated an occurrence of sphincters in the vascular bed of the villi.