Development
Embryo development involves the early formation of various structures, including the humerus bone. Ossification, which is the hardening of bones, begins in the humerus early on in the development process. Initially, only the shaft of the humerus undergoes ossification, while the head and greater tuberosity start the process at around four and ten months respectively. The overall ossification of the humerus is typically completed by the time a child reaches 13 years of age.
Fractures
The humerus is highly susceptible to fractures due to various factors. Its role in supporting all lifting activities, combined with the absence of a supporting bone, makes it vulnerable to injury. Moreover, its location in the body makes it prone to trauma. Fractures can manifest themselves in different areas of the humerus, with falls being the primary cause of these breaks. In certain instances, fractures can also result in nerve damage or impede the proper functioning of the nerves that run along the humerus. In more severe cases, fractures may even lead to arm deformities that necessitate surgical intervention.