Development
They are present as minute cavities at birth, but their main development takes place after puberty.
Read more about this topic: Sphenoidal Sinus
Famous quotes containing the word development:
“A defective voice will always preclude an artist from achieving the complete development of his art, however intelligent he may be.... The voice is an instrument which the artist must learn to use with suppleness and sureness, as if it were a limb.”
—Sarah Bernhardt (1845–1923)
“Men are only as good as their technical development allows them to be.”
—George Orwell (1903–1950)
“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)