Urine is a liquid waste material produced in and excreted by the body. Secreted by the renal tubules, it accumulates in the urinary bladder and is excreted via the urethra. While it is composed of 91 ...

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Zucker, M. B., and Borrelli, J., in Blood Platelets, edit. by Johnson, S. A., Monto, R. W., Rebuck, J. W., and Horn, R. C., 383 (Little Brown, Boston, 1961).