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.
Line with squares: net filtration through pores; line with diamonds: lymphatic flow; dot and dash line: large pores; continuous line: small pores; dashed line: ultrasmall pores.
