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Hajduk SL. Ultrastructure of the tube-foot of an ophiuroid echinoderm, Hemipholis elongata. Tissue Cell. 1992;24(1):111-9doi: 10.1016/0040-8166(92)90085-l.
Hajduk, S. L. (1992). Ultrastructure of the tube-foot of an ophiuroid echinoderm, Hemipholis elongata. Tissue & cell, 24(1), 111-9. https://doi.org/10.1016/0040-8166(92)90085-l
Hajduk, S L. "Ultrastructure of the tube-foot of an ophiuroid echinoderm, Hemipholis elongata." Tissue & cell vol. 24,1 (1992): 111-9. doi: https://doi.org/10.1016/0040-8166(92)90085-l
Hajduk SL. Ultrastructure of the tube-foot of an ophiuroid echinoderm, Hemipholis elongata. Tissue Cell. 1992;24(1):111-9. doi: 10.1016/0040-8166(92)90085-l. PMID: 18621201.
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Tissue Cell. 1992;24(1):111-9. doi: 10.1016/0040-8166(92)90085-l.

Ultrastructure of the tube-foot of an ophiuroid echinoderm, Hemipholis elongata.

Tissue & cell

S L Hajduk

Affiliations

  1. Department of Biochemistry, Schools of Medicine and Dentistry, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA.

PMID: 18621201 DOI: 10.1016/0040-8166(92)90085-l

Abstract

The morphology of the tube-foot of the brittlestar, Hemipholis elongata was examined by transmission and scanning electron microscopy. The entire surface of the tube-foot is covered by microvilli and a thick cuticle layer. At the tip of the tube-foot the cuticle layer is thinner and sensory-secretory complexes are seen. These are composed of two secretary cells and a central ciliated sensory cell. Scanning electron microscopy shows that the cilium which extends from the receptor cell ends flush with the surrounding microvilli. These studies suggest that the tube-feet in ophiuroids are important structures in sensory-reception, gas-exchange as well as locomotion. The hemoglobin containing cells within the lumen of the tube-feet may serve in oxygen transport and storage.

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