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ЛЕКЦИЯ № 38. The digestive tract structure

  March 28, 2011
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The gastrointestinal tract and associated organs are collectively called the digestive system. This system is responsible for receiving food and [...]

ЛЕКЦИЯ № 10. Muscles

  March 28, 2011
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Muscles are the active part of the motor apparatus; their contraction produces various movements. The muscles may be divided from a physiological [...]