Want this question answered?
the circadian rhythm
It does not significantly affect the circadian rhythm.
The body's natural "down time"
The human body has a 24 hour circadian rhythm.The Earth's oceans have tides that occur every day.They aren't scientifically connected to each other in any known way(s), though many people say tides and weather affect sleep patterns and enhance or disrupt the body's circadian rhythm.
http://www.answers.com/topic/body-rhythm-physiology
circadian rhythm
Each 24-hour cycle of and night is called a(n) zeitgebers!
hypothalamus
That controls sleep and wakefulness. It is the body's natural clock. It is a biological rhythm or cycle of approximately 24 hours.
The answer is: hypothalamus. :)
circadian rhythm.
Most thought of sleep.