Tendon cell Tendon cell 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. 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
Achilles tendon rupture to rupture. The use of quinolone antibiotics can cause several forms of tendinitis and tendon rupture, including rupture of the Achilles tendon. The risk is higher in people who are older than 60, who are also taking corticosteroids, or have kidney disease; it also increases with dose and taking them for longer periods of time. As of 2016 the mechanism through which quinolones cause this, was unclear. The Achilles tendon is the strongest and thickest tendon in the body, connecting the gastrocnemius, soleus and plantaris to the calcaneus. It is approximately 15 centimeters (5.9 inches) long and begins near the