Rib Cage Development & Testosterone
In males, expansion of the ribcage is caused by the effects of testosterone during puberty. Thus, males generally have broad shoulders and expanded chests, allowing them to inhale more air to supply their muscles with oxygen.
Read more about this topic: Human Rib Cage
Famous quotes containing the words rib, cage and/or development:
“Man created woman—out of what? Out of a rib of his god—of his “ideal.””
—Friedrich Nietzsche (1844–1900)
““... Let the cage bird and the cage bird mate and the wild bird mate in the wild.””
—William Butler Yeats (1865–1939)
“I can see ... only one safe rule for the historian: that he should recognize in the development of human destinies the play of the contingent and the unforeseen.”
—H.A.L. (Herbert Albert Laurens)