Qhov sib txawv tseem ceeb ntawm cov ntaub so ntswg yooj yim thiab cov ntaub so ntswg yog cov ntaub so ntswg yooj yim tsuas muaj ib hom hlwb xwb thaum cov ntaub so ntswg complex muaj ntau hom hlwb.
Hauv cov nroj tsuag, muaj ob hom ntaub so ntswg: meristematic cov ntaub so ntswg thiab cov ntaub so ntswg mus tas li. Cov ntaub so ntswg meristematic yog lub luag haujlwm rau tsim cov ntaub so ntswg tshiab los ntawm kev ntxiv cov hlwb rau hauv cov nroj tsuag lub cev. Yog li, lawv tswj cov nroj tsuag kev loj hlob. Meristematic cov ntaub so ntswg yog tam sim no nyob rau hauv cov cheeb tsam loj hlob xws li lub ntsis ntawm qia thiab cov hauv paus hniav. Meristematic cov ntaub so ntswg tsim cov ntaub so ntswg mus tas li. Cov ntaub so ntswg tas mus li ua rau feem ntau ntawm cov nroj tsuag. Cov ntaub so ntswg tas mus li muaj cov hlwb loj dua thiab cov phab ntsa nyias nyias; lawv cov nucleus yog me me thiab muaj tsawg cytoplasm. Tsis tas li ntawd, lawv cov cell tsis raug kev faib tawm ntawm tes. Raws li cov qauv ntawm tes, cov ntaub so ntswg mus tas li muaj ob pawg ua cov ntaub so ntswg yooj yim thiab nyuaj. Qhov sib txawv ntawm cov ntaub so ntswg yooj yim thiab complex tshwm sim hauv thaj chaw xws li muaj pes tsawg leeg, kev ua haujlwm, thiab lwm yam.
Cov ntaub so ntswg yooj yim yog dab tsi?
Cov ntaub so ntswg yooj yim yog cov ntaub so ntswg uas muaj tib lub hlwb xwb. Muaj peb hom ntaub so ntswg yooj yim: parenchyma, collenchyma thiab sclerenchyma. Parenchyma cov ntaub so ntswg muaj nyias-walled nyob hlwb uas ua rau softer qhov chaw ntawm cov nroj tsuag. Lub luag haujlwm ntawm parenchyma suav nrog kev cia khoom noj thiab photosynthesis.
Daim duab 01: Parenchyma Cells
Cov hlwb nyob ntawm collenchyma muaj thickenings ntawm cov ces kaum. Collenchyma cov ntaub so ntswg muab txhua yam kev txhawb nqa rau loj hlob stems thiab nplooj. Ntxiv mus, sclerenchyma muaj tuab-walled hlwb tuag (fibres) thiab ua rau cov tawv nqaij ntawm cov nroj tsuag lub cev. Li no, nws muab lub zog rau cov nroj tsuag.
Cov ntaub so ntswg yog dab tsi?
Cov ntaub so ntswg tsis yooj yim yog cov ntaub so ntswg uas muaj ntau tshaj ib hom cell. Muaj ob hom ntawm cov ntaub so ntswg complex: dermal thiab vascular. Dermal complex ntaub so ntswg muaj ob hom: epidermis thiab periderm. Epidermis muaj cov cell epidermal thiab lawv cov kev loj hlob. Nws secretes cuticles thiab tswj roj pauv thiab dej poob. Periderm muaj cork hlwb, cork cambium, thiab parenchyma hlwb. Nws tiv thaiv cov laus stems thiab cov hauv paus hniav los ntawm kev tsim cov npog tiv thaiv.
Figure 02: Xylem
Cov ntaub so ntswg muaj ob hom: xylem thiab phloem. Xylem muaj tracheids, cov hlab ntsha, parenchyma hlwb, thiab sclerenchyma hlwb. Lub luag haujlwm tseem ceeb ntawm xylem yog faib cov dej thiab dej-soluble as-ham thiab muab kev txhawb nqa kev tsim kho. Tsis tas li ntawd, phloem muaj sieve-tube cov tswv cuab, parenchyma hlwb, thiab sclerenchyma hlwb. Cov ntaub so ntswg no pab thauj cov suab thaj thiab muab kev txhawb nqa rau cov nroj tsuag.
Dab tsi yog qhov zoo sib xws ntawm cov ntaub so ntswg yooj yim thiab nyuaj?
- Cov nroj tsuag muaj cov ntaub so ntswg yooj yim thiab nyuaj.
- Lawv muaj cov nroj tsuag muaj sia.
- Ntxiv mus, lawv tseem ceeb rau kev loj hlob thiab kev loj hlob ntawm cov nroj tsuag.
- Lawv ua haujlwm sib txawv hauv cov nroj tsuag.
Dab tsi yog qhov txawv ntawm cov ntaub so ntswg yooj yim thiab nyuaj?
Cov ntaub so ntswg yooj yim yog tsim los ntawm ib hom cell thaum cov ntaub so ntswg ua los ntawm ntau tshaj ib hom cell. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm cov ntaub so ntswg yooj yim thiab complex. Piv txwv ntawm cov ntaub so ntswg yooj yim yog parenchyma, collenchyma, thiab sclerenchyma thaum piv txwv ntawm cov ntaub so ntswg yog epidermis, periderm, xylem thiab phloem. Cov nram qab no infographic qhia txog qhov sib txawv ntawm cov ntaub so ntswg yooj yim thiab nyuaj.
Summary – Yooj yim vs Complex Tissue
Cov ntaub so ntswg yooj yim thiab nyuaj yog ob hom cog cov ntaub so ntswg. Cov ntaub so ntswg yooj yim tsuas muaj ib hom cell xwb thaum cov ntaub so ntswg complex muaj ntau tshaj ib hom cell. Qhov no yog qhov sib txawv tseem ceeb ntawm cov ntaub so ntswg yooj yim thiab complex. Parenchyma, collenchyma, thiab sclerenchyma yog cov ntaub so ntswg yooj yim thaum cov epidermis, periderm, xylem thiab phloem yog cov ntaub so ntswg nyuaj.
