The loop of Henle conserves water and minimizes the volume of urine.<span />
The definition of unity is to bring things together. Unity helps create mood/ emotions by the things that it does bring together. For example if a piece of artwork has a lot of dark and shadowy areas, then maybe the mood is trying to be set as sad or isolated.
They were: Nerva, Trajan, Hadrian, Antonius Pius, and Marcus Aurelius. Although their rules were all unique in their own ways, they are most remembered for two main things. First, the Five Good Emperors brought relative peace and prosperity to Rome.