The rift valley contains the Jordan River and the Dead Sea, which separates Jordan from Israel and the Palestinian Territories. Jordan has a 26 kilometres (16 mi) shoreline on the Gulf of Aqaba in the Red Sea, but is otherwise landlocked.
Antidiuretic hormone binds to receptors on cells in the collecting ducts of the kidney and promotes reabsorption of water back into the circulation. In the absense of antidiuretic hormone, the collecting ducts are virtually impermiable to water, and it flows out as urine.
a hormone secreted by neurosecretory cells of the HYPOTHALAMUS and released by the posterior lobe of the PITUITARY GLAND. ADH stimulates the reabsorption of water through the distal-convoluted tubule of the KIDNEY nephron in mammals and thus limits the water content and the overall volume of urine.