Circadian rhythm
The 24-hour day-night cycle
Insomnia
Lack of ability to fall asleep or stay asleep
Occupied bed
A bed made while a person is in the bed
Unoccupied bed
A bad made while no person is in the bed
Closed bed
A bed completely made with the bedspread and blankets in place
Open bed
A bad made with the linen folded down to the foot of the bed
Surgical bed
A bed made to accept residents who are returning to bed on stretchers