Biology — Double Circulation Network

{
  "elements":[
    {"data":{"id":"body","label":"Body tissues"}},
    {"data":{"id":"ra","label":"Right atrium"}},
    {"data":{"id":"rv","label":"Right ventricle"}},
    {"data":{"id":"lungs","label":"Lungs"}},
    {"data":{"id":"la","label":"Left atrium"}},
    {"data":{"id":"lv","label":"Left ventricle"}},
    {"data":{"source":"body","target":"ra","label":"deoxygenated"}},
    {"data":{"source":"ra","target":"rv"}},
    {"data":{"source":"rv","target":"lungs","label":"pulmonary artery"}},
    {"data":{"source":"lungs","target":"la","label":"oxygenated"}},
    {"data":{"source":"la","target":"lv"}},
    {"data":{"source":"lv","target":"body","label":"aorta"}}
  ],
  "layout":{"name":"circle"}
}