Retinal arteriolar annuli.
D000818:Animals; D001001:Anura; D001158:Arteries / Q000166:cytology*; D001485:Basement Membrane; D001775:Blood Circulation; D002415:Cats; D003094:Collagen; D004285:Dogs; D004547:Elastic Tissue; D006168:Guinea Pigs; D000882:Haplorhini; D006652:Histological Techniques; D006801:Humans; D007202:Indicators and Reagents; D009132:Muscles; D051381:Rats; D012171:Retinal Vessels / Q000166:cytology*; D013194:Staining and Labeling
D007202:Indicators and Reagents; D003094:Collagen