Not enough sleep or disruptions to the sleep-wake cycle (such as those that may occur with shift work or travelling to a different time zone) cause the physiological state known as fatigue. Staying awake for 24 hours leads to a reduced hand-to-eye coordination that is similar to having a blood alcohol content of 0.1.
There are 13 hearts in a standard 52 card deck. There are also 13 diamonds, 13 spades and 13 clubs.
Best Answer: Normal human heart has four chambers: two atria (right and left) and two ventricles (right and left). Abnormal hearts can have three or five chambers. Source(s): cardiophile Â· 8 years ago.