zuwa nassi da ke ƙasa sannan a amsa tambayar daga baya a cikin harshe ɗaya kamar nassi: Passage: Xylem wani nau'i ne mai mahimmanci wanda ya ƙunshi abubuwa masu ruwa ko abubuwa masu ruwa, tare da fibers da parenchyma cells. Tracheids sune kwayoyin elongated tare da lignified na biyu thickening na ganuwar sel, na musamman don gudanar da ruwa, kuma sun fara bayyana a cikin tsire-tsire a lokacin sauyawa zuwa ƙasa a cikin Silurian lokaci fiye da shekaru miliyan 425 da suka wuce (duba Cooksonia). Samun xylem tracheids ya bayyana tsire-tsire masu ruwa ko Tracheophytes. Tracheids suna da mahimmanci, ƙwayoyin xylem elongated, mafi sauki daga cikinsu suna da ganuwar farko na ci gaba da ganuwar lignified na biyu a cikin nau'i na zobba, hoops, ko cibiyoyin reticulate. Ƙarin hadaddun tracheids tare da nau'i-nau'i masu nau'i-nau'i masu nau'i-nau'i masu nau'i-nau'i masu nau'i-nau
Ƙungiyar Tracheids