The valves of the heart and veins are similar in that they both _____. prevent the backflow of blood act as propellers to move b
2 answers:
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30% of the day they spend asleep.
Sleep is a process of the body that is related to the resting period of the body so that it cannot get fatigued. It is necessary to complete the average sleep cycle to stay healthy.
<h3>How to calculate sleep percentage?</h3>Given,
- Sleep per day = 7.2 hours
- One day = 24 hours
Substituting values we get,
Therefore, 30% of the time is spent sleeping.
Learn more about sleep here: