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Lymph nodes range in diameter from
Q43: Free phagocytes found in the air sacs
Q93: Which of the following is not a
Q113: Boyle's law states that the pressure of
Q117: The medullary cords of a lymph node
Q119: Internal respiration refers to exchange of oxygen
Q134: Ventilation performed by contraction of the external
Q163: An enzyme that digests proteins into peptides
Q184: Which of the following affects blood flow
Q195: Contraction of the muscle layer labeled "9"
Q200: Blood from the brain returns to the