Like normal objects, the anatomical model has Hardness. This Hardness reduces any damage the model takes by an amount equal to the Hardness.
Once an anatomical model is reduced to fewer than half its Hit Points, or immediately upon being damaged by a critical hit, its construct armor breaks, removing the Hardness and reducing its Armor Class to 13.

Construct Armor (Hardness 3)

A creature hit by the anatomical model&#x27;s guts attack is <a href="/condition/off-guard">Off Guard</a> until it takes an action to remove the guts. A creature critically hit by the anatomical model&#x27;s guts attack is <a href="/condition/immobilized">Immobilized</a> until it <a href="/action/escape">Escapes</a>.

Slimy Guts

Anatomical Model (1-2) - construct, mindless

A creature hit by the anatomical model's guts attack is @UUID[Compendium.pf2e.conditionitems.Item.Off-Guard] until it takes an action to remove the guts. A creature critically hit by the anatomical model's guts attack is @UUID[Compendium.pf2e.conditionitems.Item.Immobilized] until it @UUID[Compendium.pf2e.actionspf2e.Item.Escape]{Escapes}.