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.
a) Normal: Disc is in biconcave form. b) Folded: Disc is in twisted form. c) Lengthened: Disc is in a longer form according to the normal form. d) Round: Disc is in round form. e) Biconvex: Disc is in a shuttle form. f) Thick: Disc is in a thicker form than normal form.
