<prompt> I-phloem iyisicubu esikhethekile sokuthuthwa kokudla ezitshalweni eziphakeme, ngokuyinhloko sithutha i-sucrose ngokuhamba kwamandla okucindezela akhiqizwa yi-osmosis, inqubo ebizwa ngokuthi ukuguqulwa. I-phloem iyisicubu esiyinkimbinkimbi, esakhiwe ngezinhlobo ezimbili zamaseli, amashubhu wokuhlunga kanye namaseli ahlobene eduze, kanye namaseli e-parenchyma, imicu ye-phloem kanye ne-sclereids. Amashubhu wokuhlunga ahlanganiswe ekugcineni-ekupheleni ngama-end-plates aphukile phakathi kwaziwa njengamapuleti wokuhlunga, avumela ukuthuthwa kwe-photosynthate phakathi kwezakhi zokuhlunga. Izakhi zokuhlunga ze-tube azinayo i-nucleus nama-ribosomes, kanye nemisebenzi yazo yokuguqulwa kwesimiso sezinto eziphilayo futhi ilawulwa yizicubu ezihambisanayo ze-nucleus. Amaseli okuhlunga, axhunyiwe kumashubhu we-tube plasmata nge-modes,  <response>: izicubu ezilula ezinomsebenzi ofanayo 