Hopkins Marine Station Student Paper

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(full paper is archived in the Miller Library)

Title: Functional morphology of the connective tissue layer in the tube foot wall of Pisaster ochraceous
Student Author(s): Tang, Mai
Faculty Advisor(s): Denny, Mark
Pages: 23
Location: Final Papers Biology 175H
Date: June 1983
Keywords: echinoderms
Abstract: The connective tissue sheaths in the tube feet of Pisaster ochraceous were studied. The role played by the spiral fibers in the inner layer of this sheath during extension of the tube foot was also examined. This was done by fixing the tube feet at various states of extension, and by measuring the external dimensions and the fiber angle of the fibers. These spiral fibers were found to be extensible when the tube foot was extended or contracted, and the value of strain for the extended tube foot was very large (1.84). The fibers were also found to provide adequate hoop stiffness during the contracted state to prevent circumferential deformation of the tube foot.