Circadian Rhythm
Circadian rhythm explained in an easy to understand way:
Imagine having a favorite TV show that airs at a specific time every day, and you plan your schedule around it so you don't miss an episode. Just like this show's consistent schedule helps you organize your day, your circadian rhythm is your body's internal clock that helps regulate when you feel sleepy or awake over a 24-hour period. Just as you know when to be ready by remembering the show's airtime, your body relies on the circadian rhythm to maintain a regular sleep-wake cycle, ensuring you're alert during the day and ready for rest at night.
Practice Version
Circadian Rhythm: The 24-hour biological cycle that regulates sleep and activity circadian rhythm. It's the body's natural clock that tells us when to sleep and wake up, based on light and darkness.