Kalmar "Division Tracheophyta" tana nufin rukunin tsire-tsire na haraji wanda ya haɗa da tsire-tsire masu tsire-tsire waɗanda ke da kyallen takarda na musamman don jigilar ruwa, ma'adanai, da abubuwan gina jiki a cikin shuka. Wannan rabo ya haɗa da tsire-tsire masu tushen gaskiya, mai tushe, da ganye, kuma ya haɗa da ferns, horsetails, clubmosses, da tsire-tsire iri irin su gymnosperms da angiosperms. Waɗannan shuke-shuke sun samo asali na musamman na jijiyoyin jini, ciki har da xylem da phloem, waɗanda ke ba da damar ingantaccen jigilar ruwa da abinci mai gina jiki a cikin jikin shuka.