Examlex
According to research described in the Critical Thinking box "Has Evolution Programmed Us to Overeat?" people in food-rich societies eat because they are motivated by the positive incentive value of highly palatable foods.
Fetal Heartbeat
The heart rate of a fetus, which can typically be detected by ultrasound as early as 5-6 weeks of pregnancy.
Stethoscope
A medical instrument for listening to the action of someone's heart or breathing.
Physician
A medical professional trained to diagnose, treat, and prevent illnesses, and provide patient care.
Month
A unit of time, typically used in calendars, that roughly corresponds to the period required for the moon to orbit the Earth.
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