Before revision: upright=1.2|Endoskeleton of a swordfish An endoskeleton (From Greek ἔνδον, éndon = "within", "inner" + σκελετός, skeletos = "skeleton") is an internal structural frame (skeleton) of an animal, usually composed of mineralized tissue and overlaid by soft tissues.
After revision: upright=1.2|Endoskeleton of a swordfish An endoskeleton (From Greek ἔνδον, éndon = "within", "inner" + σκελετός, skeletos = "skeleton") is aon the inside structural frame (skeleton) of an animal, usually composed of mineralized tissue and overlaid by soft tissues.