Influenza, also called the “flu”, is a viral disease that affects humans and many animals. It most commonly causes a fever and respiratory problems. There are three groups ofinfluenza viruses<span>, called type A, B, or </span>C. Influenza<span> type A is the primary group affecting both humans and animals.
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In this photo, one can observe the big mountains, the clear blue sky, the sand which covers the ground, the path down the middle and the variety of dry, green plants.
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Muscles pull on joints, which allows us to move. They also assist the body in performing tasks such as chewing and transporting food through the digestive system. Even when we sit absolutely motionless, our muscles are continually moving throughout our bodies.
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the cell was unable to maintain a stable internal environment.
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