{
  "id": "cardiovascular",
  "name": "Cardiovascular system",
  "function": "Circulates blood to transport oxygen, nutrients, and waste products.",
  "key_organs": [
    "Heart",
    "Arteries",
    "Veins",
    "Capillaries",
    "Blood"
  ],
  "url": "https://gratisapi.com/api/body-systems/cardiovascular"
}