code/modules/surgery/organs/external/_external_organ.dm 
| /obj/item/organ/external | System for drawing organs with overlays. These overlays are drawn directly on the bodypart, attached to a person or not Works in tandem with the /datum/sprite_accessory datum to generate sprites Unlike normal organs, we're actually inside a persons limbs at all times |
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| /obj/item/organ/external/horns | The horns of a lizard! |
| /obj/item/organ/external/frills | The frills of a lizard (like weird fin ears) |
| /obj/item/organ/external/snout | Guess what part of the lizard this is? |
| /obj/item/organ/external/antennae | A moth's antennae |
| /datum/bodypart_overlay/mutant/antennae | Moth antennae datum, with full burning functionality |
| /obj/item/organ/external/pod_hair | The leafy hair of a podperson |
| /datum/bodypart_overlay/mutant/pod_hair | Podperson bodypart overlay, with special coloring functionality to render the flowers in the inverse color |