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.
Scanning electron micrographs showing a mammillary view of eggshell in young (left) and aged (right) ducks. A: Early fusion (magnification, 100 ×); B: Late fusion (100 ×); C: Isolated confluence (160 ×); D: No confluence and Type B (160 ×); E: Moderate cuffing (160 ×); F: Isolated cuffing (160 ×); G: Good caps (a) and Type A (b) (750 ×); H: Poor caps (750 ×); I: Isolated Cubic aragonite (2000 ×); J: Isolated clusters of aragonites (2000 ×).
