| the unique paired retinal vascular pattern in marsupials: structural, functional and evolutionary perspectives based on observations in a range of species. | in the few marsupial species studied to date that possess a retinal vasculature, the arterial and venous segments, down to the smallest calibre capillaries, have been shown to occur in pairs. it is a pattern seen in the marsupial central nervous system (cns) but not in other tissues in this group or in any tissues in eutherian mammals. the aim of the present study was to investigate the presence of retinal vessels in a range of non-eutherian mammalian species (marsupials and monotremes) and to d ... | 2007 | 17475712 |