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.
1a: Photograph of the caecum from the second Red-breasted Merganser with concentrically laminated fibrinous and necrotic material. Bar = 0.5 cm. 1b: Photograph of the liver from the first Red-breasted Merganser with multifocal uniformly pale tissue necrosis. Bar = 0.5 cm.
