This article is rated Start-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Animal anatomy Low‑importance This article is part of WikiProject Animal anatomy, an attempt to organise a detailed guide to all topics related to animal anatomy apart from human anatomy. To participate, you can edit the attached article, or contribute further at WikiProject Animal anatomy. This project is an offshoot of WikiProject AnimalsAnimal anatomyWikipedia:WikiProject Animal anatomyTemplate:WikiProject Animal anatomyAnimal anatomy Low This article has been rated as Low-importance on the project's importance scale.

For the one and a half sentences "The reniculate structure in cetaceans and pinnipeds does not result in a greater concentrating ability. While many marine mammals can concentrate their urine beyond the concentration of sea water, ..." what specific solute(s) are meant? It doesn't seem to be sodium and chloride, as the rest of the paragraph draws different conclusions about those. --SoledadKabocha (talk) 16:20, 17 February 2014 (UTC)[reply]