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:
“Though shoulder, bosom, lip, and knee
Are praised in every kind of art,
Here is love’s true anatomy:
His rib is gone; he’ll have her heart.”
—John Hollander (b. 1929)
“The heart of a woman falls back with the night,
And enters some alien cage in its plight,
And tries to forget it has dreamed of the stars,
While it breaks, breaks, breaks on the sheltering bars.”
—Georgia Douglas Johnson (1886–1966)
“I hope I may claim in the present work to have made it probable that the laws of arithmetic are analytic judgments and consequently a priori. Arithmetic thus becomes simply a development of logic, and every proposition of arithmetic a law of logic, albeit a derivative one. To apply arithmetic in the physical sciences is to bring logic to bear on observed facts; calculation becomes deduction.”
—Gottlob Frege (1848–1925)