Biology — Vitamin Functions

digraph Vitamins {
  rankdir=LR;
  node [shape=box, style=rounded];
  "Vitamin A" -> "Vision";
  "Vitamin C" -> "Collagen, immunity";
  "Vitamin D" -> "Calcium uptake";
  "Vitamin K" -> "Blood clotting";
  "B vitamins" -> "Coenzymes in respiration";
}