Answer: In short the circadian rhythm is your body's clock.
It regulates the body's chemical and hormonal production
and metabolism along an approximately 24 hour cycle.
This lets you sleep when it is sleep time and
become active when it is time for that.
Greetings and Thanks to Chad from PatchArena...!
» Author: Helges dtd. 26.06.2013
» Total Hits: 12636