Complex sentence: The scale defines physical measurements of development based on external primary and secondary sex characteristics, such as the size of the breasts, genitalia, and development of pubic hair, and was first identified by James Tanner, a British pediatrician and thus bears his name.
Split into simpler sentences: The scale defines physical measurements of development based on external primary and secondary sex characteristics, such as the size of the breasts, genitalia, and development of pubic hair. The Tanner scale was first identified by James Tanner, a British pediatrician and thus bears his name.