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
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
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
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
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
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
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