How many hours does each person need to sleep?

National Sleep Foundation guidelines1 advise that healthy adults need between 7 and 9 hours of sleep per night. Babies, young children, and teens need even more sleep to enable their growth and development. People over 65 should also get 7 to 8 hours per night

Explanation:

Newborns14 to 17 hours a day

12 monthsAbout 10 hours at night, plus 4 hours of naps

2 yearsAbout 11 to 12 hours at night, plus a 1- to 2-hour afternoon nap

3 to 5 years10 to 13 hours

6 to 13 years9 to 11 hours

14 to 17 years8 to 10 hours

Adults7 to 9 hours

answer; philip zimbardo;

answer; /// i believe its the cochlea;