Faeces of the medicinal leech, Hirudo medicinalis, are haem.
D000818:Animals; D001654:Bile Pigments; D005243:Feces / Q000032:analysis*; D006418:Heme / Q000032:analysis*; D007865:Leeches; D008099:Liver; D013057:Spectrum Analysis
D001654:Bile Pigments; D006418:Heme