The body system that helps fight off sickness. _ _ _ _ _ _ . _ _ _ _ _ _
Immune system
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White Blood Cells that help the body fight infections and other diseases. _ _ _ _ _ _ _ _ _ _
Leukocytes
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a jerky motion of a person's eyes occurring in sleep. _ _ _
REM or rapid eye movement
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It is the word we use to describe our emotional reaction to something that seems dangerous. _ _ _ _
Fear
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It is a microorganism that causes disease. _ _ _ _ _ _ _ _
Patahogen
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the number of times your heart beats in one minute. _ _ _ _ _ . _ _ _ _
heart rate
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It is a feeling of emotional or physical tension. It can come from any event or thought that makes you feel frustrated, angry, or nervous. _ _ _ _ _ _
stress
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It is to give all your attention to something and not think about anything else. _ _ _ _ _ _ _ _ _ _ _
concentrate
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They are the fundamental unit of the nervous system that receive and transmit signals to different parts of the body. _ _ _ _ _ _ _
neurons
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It is a state of physical and emotional exhaustion. _ _ _ _ _ _ _
burnout
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It is also known as the good stress. _ _ _ _ _ _ _ _
eustress
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a condition of body and mind that typically recurs for several hours every night, in which the eyes are closed, the postural muscles relaxed. _ _ _ _ _