Existing anatomical parameters and the need for further determinations for various tissue structures.
D000818:Animals; D001921:Brain / Q000098:blood supply* / Q000166:cytology; D002196:Capillaries / Q000166:cytology; D002415:Cats; D002560:Cerebrovascular Circulation; D000882:Haplorhini; D006651:Histocytochemistry; D008433:Mathematics