Biology — Countercurrent Multiplier (Kidney)

{
  "elements":[
    {"data":{"id":"desc","label":"Descending limb (water out)"}},
    {"data":{"id":"bottom","label":"Hairpin (high osmolarity)"}},
    {"data":{"id":"asc","label":"Ascending limb (Na+/Cl- out)"}},
    {"data":{"id":"medulla","label":"Salty medulla"}},
    {"data":{"id":"collect","label":"Collecting duct"}},
    {"data":{"id":"adh","label":"ADH -> water reabsorbed"}},
    {"data":{"id":"urine","label":"Concentrated urine"}},
    {"data":{"source":"desc","target":"bottom"}},
    {"data":{"source":"bottom","target":"asc"}},
    {"data":{"source":"asc","target":"medulla","label":"pumps salt"}},
    {"data":{"source":"medulla","target":"desc","label":"draws water"}},
    {"data":{"source":"medulla","target":"collect","label":"osmotic gradient"}},
    {"data":{"source":"adh","target":"collect"}},
    {"data":{"source":"collect","target":"urine"}}
  ],
  "layout":{"name":"breadthfirst","directed":true}
}