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.
Facts and theories of aging. There are important experimental observations (facts) in the field of aging as well as many proposed theories to explain the aging process. They offer insights into particular aspects of the aging process, but require integration to better describe the complexity of aging
