外がい皮ひ系けいMeaningsNoun1. integumentary systemKanji used外outside皮skin (of an animal or a plant)系lineageComposed of外がい皮ひskin; outer skin; integument; husk; hull; shell; crust; rind; envelope; exodermis; …Noun系けいsystem; lineage; group; corollary; system (range of strata that correspond to a particular time period); (taxonomical) seriesNoun