Video: Dab tsi yog ob hom vascular cov ntaub so ntswg pom nyob rau hauv cov hlab ntsha?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov khoom tseem ceeb ntawm cov ntaub so ntswg vascular yog xyleman phloem . Ob daim ntaub so ntswg no thauj cov kua thiab cov as -ham sab hauv.
Ib yam li ntawd ib tug yuav nug, cov ntaub so ntswg nyob qhov twg?
Cov leeg nqaij yog pom Nyob rau hauv tag nrho cov aplant lub vegetative kab mob - uas yog, cov hauv paus hniav, stems, thiab nplooj. Xylem thiab phloem pib tawm raws li ib tug tshwj xeeb hom. cov ntaub so ntswg npe cambium.
Ib yam li ntawd, cov ntaub so ntswg vascular hauv tib neeg yog dab tsi? Cov ntaub so ntswg hauv tib neeg lub cev muaj cov hlab ntsha zoo li cov leeg, cov hlab ntsha thiab cov hlab ntshav, thaum lub cev cov ntaub so ntswg tsis ua. Piv txwv li, leeg nqaij cov ntaub so ntswg yog cev , los yog vascularized. Cov nqaij nrog ntau cov hlab ntshav, zoo li cov leeg hauv lub ntsws thiab daim siab, tau hais tias "vascularized heev."
Ua li no, ob hom ntaub so ntswg uas pom muaj hauv cov nroj tsuag yog dab tsi?
Nroj tsuag muaj peb leeg xwb hom ntaub so ntswg : 1) Daim tawv nqaij; 2) Hauv av; thiab 3) Cov hlab ntsha. Dermal cov ntaub so ntswg npog theouter nto ntawm herbaceous nroj tsuag . Dermal cov ntaub so ntswg iscomposed ntawm epidermal cells, kaw cov cell uas tso tawm cov tawv nqaij tawv uas pab hauv kev tiv thaiv kev poob dej.
Ob hom kab mob vascular piav txog kev ua haujlwm ntawm txhua tus yog dab tsi?
Cov cov ntaub so ntswg suav nrog xylem, uas coj cov dej thiab cov zaub mov los ntawm cov hauv paus mus rau saum thiab thoob plaws hauv cov nroj tsuag, thiab phloem, uas thauj cov as -ham yaj hauv cov lus qhia tsis tseeb hauv tsob ntoo. Cov nkoj tseem ceeb ntawm xylemare cov tracheids thiab cov hlab ntsha.
Pom zoo:
Cov hlab ntsha hlab ntsha thiab cov hlab ntshav muaj dab tsi?
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Muaj peb yam tseem ceeb ntawm cov hlab ntsha: cov hlab ntsha. Lawv nqa cov ntshav uas muaj oxygen tawm ntawm lub plawv mus rau tag nrho lub cev cov ntaub so ntswg. Capillaries. Cov no yog cov hlab ntshav me me, uas txuas cov hlab ntsha thiab cov leeg. Cov leeg