Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Hierarchical structure of bone. Images for Levels 2–5 and 7 after Weiner and Wagner (1); for Level 1 after Rho et al. (2); for Level 6 from Functional Anatomy & Biomechanics (University of Glasgow, http://www.gla.ac.uk/ibls/US/fab/tutorial/generic/bone2.html). The arrows point from a higher to a lower hierarchy level. Levels 6 and 7, macroscopic length scale; Level 5, mesoscale; Levels 3 and 4, micron scale; Levels 1 and 2, nanoscale.
