Reticular fibers in Hassall's corpuscles.
D000818:Animals; D002415:Cats; D002417:Cattle; D004285:Dogs; D004848:Epithelium / Q000196:embryology; D005260:Female; D006168:Guinea Pigs; D006801:Humans; D012159:Reticulum; D013194:Staining and Labeling; D013950:Thymus Gland / Q000033:anatomy & histology* / Q000196:embryology