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A humerus bone fracture near the elbow is a common injury among children who fall.

Among several examples: blood loss triggered rapid red blood cell production in the sternum, tibia, vertebrae, and humerus -- but not in the skull.

However, about ten men from the hospital had symmetrical humeri, yet they had no signs of a poor upbringing, limited growth, or chronic illness.

The UCL connects the humerus bone to ulna bone at the elbow.

Thicker bones, like the femur and humerus, tend to better withstand heat.