Krov' — zhidkaya soedinitelnaya tkann, perenosyashchaya kislorod, pitatel'nye veshchestva i gormony. Eyo svoystva opredelyayutsya kletochnym sostavom (eritrotsity, leykotsity, trombotsity) i plazmoy. Vazhnayeshie kharakteristiki: viyazkost', pH, svyortyvayemost'. Analiz krovi — klyuchevoy diagnosticheskiy metod.