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A. Urea B. Uric acid C. Ammonia D. None
A. Hepatic portal system B. Renal portal system C. Three venae cavae D. Hepatic vein
A. Pelvic girdle B. Intercostal muscle C. Biceps muscles D. None of them
A. Nostrils B. Trachea C. Bronchus D. Alveoli
