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.
Transverse section of inner medulla (IM) taken approx. 40 μm below the OM–IM border (IM base) showing collecting duct (CD) clusters in blue surrounded by descending thin limbs in white. Scale bar: 100 μm. From Pannabecker and Dantzler (2004), used with permission.
