Yintoni i-xylem yesityalo?

IXylem yeCucurbita maxima (ithanga) ibonwa phantsi kwemicroscope.

Xylem ICucurbita maxima (ithanga) libonwa phantsi kwemicroscope.

Izityalo zizinto eziphilayo ezintsonkothe ​​ngakumbi kunokuba besinokucinga ekuqaleni. Ngapha koko, akunyanzelekanga ukuba bakwazi ukulawula ukufumana yonke into abayifunayo ngaphandle kokusuka kwindawo apho bahluma khona, kodwa ulwakhiwo lwangaphakathi luye lwavela lwaba yile nto luyiyo namhlanje.

Elinye lawona macandelo abalulekileyo yile xylemKodwa yintoni kanye kanye kwaye yintoni umsebenzi wayo?

Yintoni i-xylem?

I-xylem, igama elivela kwigrike yesiGrike elithetha ukhuni okanye iinkuni, sisihlunu sesityalo esine-lignified ohambisa amanzi, ityuwa yezimbiwa kunye nezinye izondlo ukusuka ezingcanjini ukuya kumagqabi ezityalo ezinemithambo. Ezi zinto zibizwa ngokuba yincindi eluhlaza.

Yenziwe ziindidi ezininzi zeeseli ezimile njenge-tubular ezibonakaliswa ngokuba nodonga lwesibini lweseli, iityhubhu ezibizwa ngokuba zii-tracheids ezifana nesihloko senaliti ye-hypodermic (leyo isetyenziselwa iyeza ukufaka izinto emzimbeni) kwaye zenziwe amacandelo asekondari angaphuhliswanga.

Iindidi

  • Kwiprayimari:
    • Iprotoxylem: Ngexesha lokuphuhliswa kwe-xylem yokuqala inesicwili sokuqala sokuqhuba esikhula sibe ngamalungu akhulayo. Xa bephantsi koxinzelelo, iinqanawa zabo ziringiwe okanye zajikeleza.
    • I-Metaxylem: ifumaneka kwizityalo ezisencinci, kodwa iyavuthwa xa igqityiwe ukukhula.
  • Esekondari: ivela kwi-cambium kwaye yenziwe:
    • Izinto eziqhubayo: Iinqanawa ezidityaniswe yimigubasi kwiindonga zazo ezisisiseko, kunye neetyhubhu ezihamba ngaphandle kokugqobhoza kwezi ndonga zikhankanywe ngasentla.
    • Izinto ezingahambisiyo: ifayibha ze-xylem.
Xylem kunye ne-phloem

Umfanekiso - iTypede.eu

Uyintoni umsebenzi wakho?

Umsebenzi weXylem ngu dlulisa amanzi kunye nezondlo ezanyibilika kuwo ezithi iingcambu zifunxe amagqabi esiqwini nasemasebeni.

Ngaba uyifumene inomdla?


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