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Tendon cell

Tendon cell
Details
Latin Tendinocytus
Identifiers
Code TH H3.03.00.0.00024
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Anatomical terminology

Vertebrates

Tendon cells, or tenocytes, are elongated fibroblast type cells. The cytoplasm is stretched between the collagen fibres of the tendon. They have a central cell nucleus with a prominent nucleolus. Tendon cells have a well-developed rough endoplasmic reticulum and they are responsible for synthesis and turnover of tendon fibres and ground substance.

Invertebrates

Tendon cells form a connecting epithelial layer between the muscle and shell in molluscs. In gastropods, for example, the retractor muscles connect to the shell via tendon cells. Muscle cells are attached to the collagenous myo-tendon space via hemidesmosomes. The myo-tendon space is then attached to the base of the tendon cells via basal hemidesmosomes, while apical hemidesmosomes, which sit atop microvilli, attach the tendon cells to a thin layer of collagen. This is in turn attached to the shell via organic fibres which insert into the shell. Molluscan tendon cells appear columnar and contain a large basal cell nucleus. The cytoplasm is filled with granular endoplasmic reticulum and sparse golgi. Dense bundles of microfilaments run the length of the cell connecting the basal to the apical hemidesmosomes.

References

Krstić, R. V. (1984) Illustrated Encyclopedia of Human Histology, Springer Verlag, Berlin

Tompa, A. S. and Watabe, N. (1976). "Ultrastructural investigation of the mechanism of muscle attachment to the gastropod shell.". Journal of Morphology 149 (3): 339–351. PMID 957445. doi:10.1002/jmor.1051490304. 


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