Humerus fracture physically active young adult men who experience physical trauma to the humerus. Distal fractures are rare among adults, occurring primarily in children who experience physical trauma to the elbow region. Humerus fracture A humerus fracture is a break of the humerus bone in the upper arm. Symptoms are pain, swelling, and discoloration of the skin at the site of the fracture. Bruising appears a few days after the fracture. The neurovascular bundle of the arm may be affected in severe cases, which will cause loss of nerve function and diminished blood supply beneath the fracture. Proximal and distal fractures will
Bone marrow the umbilical cord. The earliest fossilised evidence of bone marrow was discovered in 2014 in "Eusthenopteron", a lobe-finned fish which lived during the Devonian period approximately 370 million years ago. Scientists from Uppsala University and the European Synchrotron Radiation Facility used X-ray synchrotron microtomography to study the fossilised interior of the skeleton's humerus, finding organised tubular structures akin to modern vertebrate bone marrow. "Eusthenopteron" is closely related to the early tetrapods, which ultimately evolved into the land-dwelling mammals and lizards of the present day. Bone marrow Bone marrow is a semi-solid tissue which may be found within the spongy or