Long Description of Figure 9

Graph of body temperature to time of day. The y axis shows body temperature ranging from 96 to 98.5 degrees Fahrenheit. The x axis shows a 24-hour period, from just before 11 p.m. to 7 a.m. to 11 p.m. A solid line is shown beginning at the left at a high temperature of 98.5 just before 11 p.m. and falling below 96.5 just before 7 a.m., then rising to 98 just after 7 a.m., and leveling off at 98.5 until 11 p.m. The period between 11 p.m. and 7 a.m. is boxed and labeled as sleep.

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