Blood vascular system of the sea cucumber, Stichopus moebii.

Autor: Herreid CF 2nd; Departments of Biology and Anatomy, State University of New York at Buffalo, New York 14214., LaRussa VF; Departments of Biology and Anatomy, State University of New York at Buffalo, New York 14214., DeFesi CR; Departments of Biology and Anatomy, State University of New York at Buffalo, New York 14214.
Jazyk: angličtina
Zdroj: Journal of morphology [J Morphol] 1976 Oct; Vol. 150 (2), pp. 423-451.
DOI: 10.1002/jmor.1051500211
Abstrakt: Stichopus moebii, a sea cucumber, has a closed circulatory system which is unique in its degree of development for the phylum Echinodermata. The gross anatomy, histology and fine structure of the system were studied. Blood vessels consist of a coelomic surface of ciliated epithelium, a layer of muscle and nerve cells, followed by connective tissue and luminal lining of endothelium. Basically the blood vascular system consists of two major vessels running parallel to the gut: the dorsal vessel pumps colorless blood via the vessels within the walls of the intestine into the ventral vessel. There are two specialized areas of the circulation: (1) At the upper small intestine 120 to 150 muscular single-chambered hearts pump blood from the dorsal vessel into a series of intestinal plates. (2) At the lower region of the small intestine the vasculature is associated with the left respiratory tree. Blood passing from the dorsal pulmonary vessel can take two routes to the gut, it either passes through myriads of minute respiratory shunt vessels entangled with the respiratory tree or it passes through a unique follicle network consisting of tiny channels periodically dilated into chambers filled with iron deposits, necrotic cells and developing coelomocytes.
(Copyright © 1976 Wiley-Liss, Inc.)
Databáze: MEDLINE
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