Town of Southampton Housing Authority Â· October 20, 2017 Â· Thank you East End Beacon for your great coverage of this wonderful cause that we were able to be a part of.
Definition of circadian. : being, having, characterized by, or occurring in approximately 24-hour periods or cycles (as of biological activity or function) circadian rhythms in activity.
The body clock, or circadian clock, is an internal clock that keeps track of time. Circadian comes from circa-diem meaning around a day. So in a mouse for example it is about 23.5 hours and for a human its about 24.5 hours. If you are kept in constant darkness your body will still work to around a 24-hour cycle. It is not just being driven by light and dark. It is an intracellular clock so if you look in individual cells they are all able to keep time as well. If you put cells in a dish they will show 24-hour changes in gene expression.