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Active fibroblast
Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x
![Fibroblast nuclei <p>Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-3-1-ping.png)
Fibroblast nuclei
Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x
![Elastic fibers <p>Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-3-2-ping.png)
Elastic fibers
Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x
![Collagen fibers <p>Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-3-3-ping.png)
Collagen fibers
Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x
![Epithelium <p>Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-3-4-ping.png)
Epithelium
Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x
![Mast cell <p>Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-3-5-ping.png)
Mast cell
Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x
![Blood vessels <p>Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2018/05/T.CT_.CTP_.Cells-3-6-ping.png)
Blood vessels
Active fibroblasts are resident cells found in connective tissues. Their nuclei are euchromatic and elongated. This toluidine blue stain of loose connective tissue beneath an epithelium demonstrates the pale-staining collagen fibers and heavily stained elastic fibers. Blood vessels are also visible. 1000x