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ANATOMICAL AND FUNCTIONAL ADAPTATIONS I‐N THE VENOUS SYSTEM OF A DIVING REPTILE, TRIONYX TRIUNQUIS (FOR. SKAL)
Author(s) -
GIRGIS SABET
Publication year - 1962
Publication title -
proceedings of the zoological society of london
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.915
H-Index - 96
eISSN - 1469-7998
pISSN - 0370-2774
DOI - 10.1111/j.1469-7998.1962.tb05704.x
Subject(s) - anatomy , vein , venous valves , external jugular vein , turtle (robot) , medicine , biology , surgery , ecology
The main veins of the Nile turtle Trionyx triunguis exhibit certain features in common with thorn of diving mammals. The jugular system is greatly reduced and the head is drained lwgely by an intravertebral vein. A peculiar snastomosing of the venous system in several parts ensures venous circulation under all conditions. The absence of valves from certain veins, the presence of venous plexuses and retia mirabila and othermo difications of the veins to suit the diving habit, are described.