A detailed, hand-drawn illustration on aged parchment, depicting a cross-section of a massive heart repurposed as a labyrinth of laboratories. Each chamber houses a unique scientific workspace, filled with colorful flasks, bubbling cauldrons, and intricate glassware. The rooms do not strictly follow anatomical accuracy but create a surreal, whimsical network of research stations, each illuminated by flickering candlelight.Tiny scholars and alchemists in vintage coats bustle about, pouring glowing liquids and jotting notes on ancient scrolls. Delicate ink strokes, cross-hatching, and a muted yet rich color palette give the piece an aged, timeless quality, blending vibrant scientific wonder with the mystery of an old-world anatomical sketch. The outer edges of the heart fade into intricate, hand-written annotations and faded ink stamps, reinforcing the fusion of science, fantasy, and history.