s/n5510907

Information
has gloss	(noun) a system of body parts that together serve some particular purpose tract
lexicalization	eng: tract
subclass of	(noun) a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion" system
has subclass	(noun) the passages through which air enters and leaves the body respiratory tract, airway
has subclass	(noun) the organs and tubes involved in the production and excretion of urine urinary tract