Figure 3: (a) Loop of Henle. Adapted and modified from Human Physiology 12th by Fox SI. New York: The McGraw-Hill Companies; 2011. Figure 17.14. (b) Salivary gland. Adapted and modified with permission from Elsevier: Autoimmunity Reviews “The imprint of salivary secretion in autoimmune disorders and related pathological conditions” by Bhattarai et al. 2018.