The paired lungs enclose the branching bronchial tree and alveoli. ____
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Q21: The pumping (contracting) phase of the heart
Q22: All body systems are assisted by the
Q23: Hormones transfer information from one set of
Q24: The _ system monitors and controls almost
Q25: The nervous system assists the endocrine system
Q27: Tendons connect bones to bones. _
Q28: In a relaxed state, the normal heart
Q29: The thoracic and abdominal cavities are separated
Q30: Metabolism is defined as the chemical reactions
Q31: The endocrine system secretes hormones directly into
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