Tendon cell

Details
Location| Tendon
Identifiers
Latin| tendinocytus
MeSH| D000070916
TH| H3.03.00.0.00024
Anatomical terms of microanatomy

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## Vertebrates[edit]

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[edit]

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.

## See also[edit]

* List of human cell types derived from the germ layers
* List of distinct cell types in the adult human body

## References[edit]

* Krstić RV (1984). Illustrated Encyclopedia of Human Histology. Berlin: Springer Verlag.
* Tompa AS, Watabe N (July 1976). "Ultrastructural investigation of the mechanism of muscle attachment to the gastropod shell". Journal of Morphology. 149 (3): 339–52. doi:10.1002/jmor.1051490304. PMID 957445. S2CID 35530166.

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Connective tissue

Physiology|

* Soft tissue
* Fibrosis
* Scarring

Composition|

| Cells|

| Resident|

* Fibroblast
* Fibrocyte
* Reticular cell
* Tendon cell
* Adipocyte
* Melanocyte

|

Wandering cells|

* Mast cell
* Macrophage

Extracellular
matrix|

| Ground substance|

* Tissue fluid

|

Fibers|

* Collagen fibers
* Reticular fibers
* COL3A1
* Elastic fibers
* Elastin
* Fibrillin
* FBN1
* FBN2
* FBN3
* EMILIN1
* Elaunin

Types|

| Proper|

| Loose|

* Reticular
* Adipose
* Brown
* White

|

Dense|

* Dense irregular connective tissue
* Submucosa
* Dermis
* Dense regular connective tissue
* Ligament
* Tendon
* Aponeurosis

Embryonic|

* Mucoid
* Mesenchymal

Specialized|

* Cartilage
* Bone
* Blood

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