part of part of fibroblast tendon cell An elongated fibroblast that is part of a tendon. Its cytoplasm is stretched between the collagen fibres of the tendon, and it possesses a central nucleus with a prominent nucleolus. Tendon cell has a well-developed rough endoplasmic reticulum, and it is responsible for the synthesis and turnover of tendon fibres and ground substance. ZFA:0009189 tenocyte muscle attachment cell fibroblast of dense regular elastic tissue tendon