Steam rises from the hotpot, and a pattern emerges: meat shreds into soft strands while mushroom slices keep their bounce. The explanation sits in their architecture. Animal tissue and fungal tissue answer boiling water with very different structural strategies, and the result shows up on your chopsticks.
Muscle is built from protein fibers held together by collagen. Under prolonged heating, collagen undergoes thermal denaturation and then gelatinization, its triple helix unwinding and forming gelatin that loosens the network. Water infiltrates, fibers separate, and the bite softens. The same heat that speeds basic metabolic rate in living cells now accelerates entropy increase in the pot, pushing meat toward structural collapse.
Mushroom tissue is organized around a cell wall rather than a protein rich extracellular matrix. That wall is a composite of chitin microfibrils and beta glucans, a biopolymer system closer to insect shells than to steak. Chitin has high thermal stability and resists the kind of collagen like unwinding that softens meat. Even when some proteins inside fungal cells denature, the polysaccharide scaffold keeps the geometry intact, limiting deformation.
Water also behaves differently. Animal fibers swell and separate as gelatin forms, but fungal cell walls act like semi rigid sponges. They absorb broth while preserving their mesh, so texture shifts from crisp to chewy rather than to fragments. The marginal effect of additional boiling time on this network is small: more flavor uptake, only modest loss of firmness. What finally gives way is patience at the table, not the mushroom structure.
In the end, the hotpot surface becomes a quiet cross section of biology: collapsed meat fibers drifting beside intact fungal lattices, two heat histories written into a single simmering broth.
