Changes in the microvasculature with age.
D000375:Aging; D000818:Animals; D001158:Arteries / Q000166:cytology*; D001160:Arterioles / Q000032:analysis / Q000166:cytology*; D001485:Basement Membrane / Q000648:ultrastructure; D002415:Cats; D002467:Cell Nucleus / Q000648:ultrastructure; D004727:Endothelium / Q000648:ultrastructure; D009130:Muscle, Smooth / Q000166:cytology; D010503:Periodic Acid-Schiff Reaction; D051381:Rats; D014680:Veins / Q000166:cytology*; D014699:Venules / Q000032:analysis / Q000166:cytology*