The Chest cavity Minecraft mod is an interesting mod that gives each player and mob a chest cavity with items you can look at inside a chest, known as the ‘chest opener. In this system, organs are categorized into three tiers: rotten, animal, and human. Rotten and small animal organs are less effective than human ones, but all can be swapped and stacked to customize your body. You begin with a full set of human organs, but there’s always room to add or make space for more. Organs are usually bound to their original owner; using another’s causes painful Organ Rejection. However, loot-dropped or unclaimed organs are safe. Organs can be used briefly or repurposed into materials. Each organ has a unique function: ● Heart for health ● Lungs for breath ● Ribs for defense and strength ● Muscles for strength and speed ● Spleen for faster healing ● Kidneys for blood health, too few kidneys will poison you ● Spine for movement and damage resistance ● Liver for toxin resistance and removing status ailments faster ● Intestines for nutrition and the saturation of food ● Stomach for increased fullness ● Appendix... well, it's lucky! Some creatures have unique organs with special effects, and certain crafted items can enhance your chest cavity, even negating surgical damage early on. Mix, match, and modify your internals to survive and thrive, just don’t forget to keep your lucky appendix.