human_reference_atlas part of has part neutrophil Homo sapiens bone marrow http://upload.wikimedia.org/wikipedia/commons/7/74/Gray72-en.svg CALOHA:TS-0087 NCIT:C12431 medulla ossea The soft tissue that fills the cavities of bones. MAT:0000084 UMLS:C0005953 EMAPA:32760 uberon SCTID:421320006 BTO:0000141 TODO - create superclass for bone marrow / head kidney. both are portions of tissue in the hematopoetic system. also consider adding as subclass of zone of bone organ for consistency with FMA. See also: Leydig and epigonal organs In adults, marrow in large bones produces new blood cells[Wikipedia:Bone_marrow] The bone marrow is the hematopoietic organ in all vertebrates but fishes, in which hematopoiesis occurs in the kidney.[well established][VHOG] AS EFO:0000868 MA:0000134 AAO:0011007 bone marrow FMA:9608 XAO:0000123 bone marrow UBERON:0002371 EV:0100046 MIAA:0000084 Bone marrow GAID:1287 VHOG:0001218 Wikipedia:Bone_marrow galen:BoneMarrow medulla ossium BTO:0000829 medullary bone medulla of bone consider placement of NCIT:C53466 medullary bone MESH:D001853 hematopoietic system immune system multicellular anatomical structure body proper