Why do we sleep?
Stages of sleep
Sleep consists 4 stages the deepest of which are known as slow wave sleep and rapid eye movment. For most of us sleep feels like a pause button were we jump on the bed shut our eyes and are bodys stop functioning.
https://www.youtube.com/watch?v=CoCL0IB4u4g
Why do we sleep?
We all have an internal biological clock that regulates our 24-hour sleep. We call them circadian rhythms.
https://www.youtube.com/watch?v=CoCL0IB4u4g
Cortisol and Melatonin
During the day, when there is light, your brain releases a hormone called cortisol, which keeps you awake up and going.As the sun sets and the night appears causing darkness your brain trigers the release of melatolin a harmone that makes you sleepy.
Why do we sleep?
Monica Marin
Created on October 14, 2025
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Transcript
Why do we sleep?
Stages of sleep
Sleep consists 4 stages the deepest of which are known as slow wave sleep and rapid eye movment. For most of us sleep feels like a pause button were we jump on the bed shut our eyes and are bodys stop functioning.
https://www.youtube.com/watch?v=CoCL0IB4u4g
Why do we sleep?
We all have an internal biological clock that regulates our 24-hour sleep. We call them circadian rhythms.
https://www.youtube.com/watch?v=CoCL0IB4u4g
Cortisol and Melatonin
During the day, when there is light, your brain releases a hormone called cortisol, which keeps you awake up and going.As the sun sets and the night appears causing darkness your brain trigers the release of melatolin a harmone that makes you sleepy.