Biology — Sleep-Wake Cycle

{
  "elements":[
    {"data":{"id":"light","label":"Light (retina)"}},
    {"data":{"id":"scn","label":"Suprachiasmatic nucleus"}},
    {"data":{"id":"pineal","label":"Pineal gland"}},
    {"data":{"id":"melatonin","label":"Melatonin (at night)"}},
    {"data":{"id":"sleep","label":"Sleep promoted"}},
    {"data":{"id":"adenosine","label":"Adenosine builds up"}},
    {"data":{"id":"pressure","label":"Sleep pressure"}},
    {"data":{"source":"light","target":"scn"}},
    {"data":{"source":"scn","target":"pineal"}},
    {"data":{"source":"pineal","target":"melatonin"}},
    {"data":{"source":"melatonin","target":"sleep"}},
    {"data":{"source":"adenosine","target":"pressure"}},
    {"data":{"source":"pressure","target":"sleep"}}
  ],
  "layout":{"name":"breadthfirst","directed":true}
}