Biology — Chart: Blood Composition

{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "description": "Blood composition",
  "data": {"values": [
    {"part": "Plasma", "percent": 55},
    {"part": "Red cells", "percent": 44},
    {"part": "White cells & platelets", "percent": 1}
  ]},
  "mark": "arc",
  "encoding": {
    "theta": {"field": "percent", "type": "quantitative"},
    "color": {"field": "part", "type": "nominal", "title": "Component"}
  }
}