This section is from the book "Applied Anatomy: The Construction Of The Human Body", by Gwilym G. Davis. Also available from Amazon: Applied anatomy: The construction of the human body.
The upper articular surface of the radius has a centre of ossification which appears from the fifth to the seventh year, and unites at the eighteenth to twentieth year. There is also a centre for the tubercle. Surgical writers as a rule do not speak of epiphyseal separations of the upper ends of the radius and ulna.
Fig. 315. - Epiphysis of the lower end of the humerus; unites with the shaft at about the seventeenth or eighteenth year.