An official website of the United States government
Here's how you know
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.
Electron micrographs of callosal tissue from subdivision E from (a) Saimiri sciureus, (b) Macaca maura, (c) Gorilla gorilla and (d) Homo sapiens. Scale bar, 1 µm.