He ngongo, he awa rānei hei kawe i tētahi matū. He pū kei roto i te tinana hei kawe i ngā momo wē, pērā i te roimata, te waiate me ngā toto. He pū anō kei roto i te tipu hei kawe i te wai, te tahe me ngā taiora.
A tube, vessel or channel that conveys a substance within it. In the body, ducts carry different types of liquid such as tears, bile and blood. Plants also have ducts which carry water, sap and nutrients.