Bluebulb Projects' The Measure of Things presents:
210 is about one-and-one-tenth times the number of Bones in the Human Body.
In other words, it's 1.02 times the count of Bones in the Human Body, and the count of Bones in the Human Body is 0.980 times that amount.
(adult, excluding sesamoid bones and ossicles)
The adult human body contains 206 bones. A newborn's body contains more bones — 270 — with unfused bone segments in the legs, arms, head, and face.