Muscle contraction is the activation of tension-generating sites within muscle
fibers. In physiology, muscle contraction does not mean muscle
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A group of tissues that work together to perform one basic function are called
An organ is defined as a group of tissues that work together to perform a ...
... of living things because they help keep the pH within organisms' body stable. ...
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affect everything from the beating of
I. Levels of Organization: Cells>>>>
There are four main
Blood A fluid that carries oxygen and nutrients to the