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