Your Sleep and Rest 4.0 from 0 reviews
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Body cells need to take a break once in a while if they are to perform their best, so it's important that people get a lot of sleep.

Encyclopedia Britannica, 331 N. LaSalle St., Chicago, IL 60610, Phone: (312)347-7159, Toll-free: 800-323-1229, Fax: (312)294-2104, URL:

Available on Running time 6 minutes.

Cast and Crew

Sleep, Health Education
Encyclopedia Britannica Educational Corporation

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