Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Hanyar wucewa: Xylem wani nau'i ne mai mahimmanci wanda ya kunshi tracheids mai ruwa ko abubuwa na jirgin ruwa, tare da fibers da parenchyma Kwayoyin. Tracheids ƙwayoyin elongated ne tare da ƙwanƙwasawa na biyu na bangon sel, ƙwararru don gudanar da ruwa, kuma sun fara bayyana a cikin tsire-tsire yayin sauyawa zuwa ƙasa a cikin Silurian tsawon shekaru sama da miliyan 425 da suka gabata (duba Cooksonia). Mallakar xylem tracheids yana bayyana tsire-tsire masu tsire-tsire ko Tracheophytes. Tracheids suna da mahimmanci, ƙwayoyin xylem masu tsawo, mafi sauki daga cikinsu suna da ganuwar ƙwayoyin salula na farko da kuma ƙuƙwalwar ƙwayoyin ƙwayoyin cuta na biyu a cikin nau'i na zobba, hoops, ko cibiyoyin sadarwa. Tracheids masu rikitarwa tare da ramuka masu kama da bawul da ake kira ramuka masu iyaka suna nuna gymnosperms. Ferns da sauran pteridophytes da gymnosperms suna da xylem tracheids kawai, yayin da tsire-tsire masu fure kuma suna da tasoshin xylem. Abubuwan jirgi sune ƙwayoyin xylem marasa ƙarfi ba tare da bangon ƙarshen da aka daidaita daga ƙarshen zuwa ƙarshen don samar da tubes masu ci gaba ba. Bryophytes ba su da ƙwayoyin xylem na gaskiya, amma ƙwayoyin ƙwayoyin su suna da ƙwayoyin ruwa da ake kira hydrome wanda ya ƙunshi ƙwayoyin elongated na tsari mai sauƙi.  Tambaya: Fibers, parenchyma cell da kuma abin da wasu tasoshin hada Xylem?
Ƙungiyar Tracheids