Bone marrow Bone marrow Bone marrow is a semi-solid tissue which may be found within the spongy or cancellous portions of bones. In birds and mammals, bone marrow is the primary site of new blood cell production or hematopoiesis. It is composed of hematopoietic cells, marrow adipose tissue, and supportive stromal cells. In adult humans, bone marrow is primarily located in the ribs, vertebrae, sternum, and bones of the pelvis. On average, bone marrow constitutes 4% of the total body mass of humans; in an adult having 65 kilograms of mass (143 lb), bone marrow typically accounts for approximately . Human marrow
Ver sacrum of the Roman people ("iussu populi"), then he specified a long series of unfavourable events and circumstances which were as a rule regarded as invalidating but would not be so as far as the present "votum" was concerned in the case they happen. The overall authenticity of the formula preserved in Livy's passage has been noticed by Dumézil while the exceptional theological and juridical prudence showed by Lentulus in ensuring that both fraud and ignorance of private citizens would not affect the validity of the "sacrum" and harm the Roman people has been remarked by Bouché-Leclercq. Ver sacrum Ver sacrum