AZO, silsilai uzvhoi odam, ki yak yo chand vazifahoi makhsusro ijro mekunand. Magzi sar, dil, chashm, jigar, meda va g. misolhoi A. meboshand. Hamai A.-i organizm ba hamdigar aloqamand buda, dar ijroi vazifai khud ba A.-i tom budani organizm dalolat mekunand. A. az rui vazifahoi asosi tasnif karda meshavad, mas., A.-i harakat, A.-i hozima, A.-i nafas va g. Nig. niz Uzvhoi nafaskashi, Uzvhoi nutq, Uzvhoi tanosul, Uzvhoi hozima.