Bone marrow

Bone marrow is a fatty tissue located in some bones (for example the iliac crest) whose function is to manufacture blood cells, hence its learned name haemopoietic tissue (haemo = blood and poiein = make). Once the blood cells become adult they enter the blood circulation where they perform their roles. Bone marrow may give rise to blood cancers, leukaemias and myelomas. This has nothing to do with the spinal cord although both are located in bone structures, hence their name marrow in some languages.