How Much Do You Actually Know About Butts?

You're either right or wrong — no ifs, ands, or butts.

Anatomical information sourced in part from:

• The Princeton Review Anatomy Coloring Workbook, 3rd Edition, I. Edward Alcamo, PhD, Pengiun Random House 2012.

• The Medline Plus Information Database of The National Institute of Health (NIH) and US National Library of Medicine.

• The Mayo Clinic