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Summary Plantweefsel graad 10 Lewenswetenskappe opsomming R98,00   Add to cart

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Summary Plantweefsel graad 10 Lewenswetenskappe opsomming

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Hierdie dokument is 'n volledige opsomming van die verskillende tipes plantweefsel vir graad 10 lewenswetenskappe. Dit sluit in: meristematiese weefsel, permanente weefsel, vaatweefsels, en vervoerweefsels.

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  • August 10, 2023
  • 5
  • 2023/2024
  • Summary
All documents for this subject (3)
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emmagriesel
Weefsel: Baie selle wat ‘n spesifieke funksie het, en wat dan saamwerk om daardie funksie te
verrig.



Twee tipes weefsel
Eenvoudige weefsel: Bestaan uit identiese selle.
Komplekse weefsel: Bestaan uit verskillende tipes selle wat verskillende funksies vir ‘n
gemeenskaplike doel uitvoer.



Weefselkultuur
Wanneer wetenskaplikes weefsel kweek, deur aan die selle alles te gee wat hulle nodig het
om te verdeel. ‘n Voordeel hiervan is dat hierdie weefsel gebruik kan word om groot
hoeveelhede en goedkoper medisyne te maak.




Weefsel met ongedifferensieerde selle en ongespesialiseerde selle. Nuwe selle wat vorm
differensieer nie, hulle laat net die plant groei en sal op ‘n latere stadium spesialiseer in
permanente weefsel in.


Kom voor in Struktuur
1. Dunwandige onvolwasse selle
Die apikale meristeem wat op punte van
2. Diggepak in lae
wortels + stingels voorkom.
3. Geen intersellulêre lugruimtes nie
Die laterale meristeem wat die plant 4. Enkele groot kern
dikker laat word. 5. Digte sitoplasma
6. Klein of geen vakuool


Funksies
1. Maak nuwe selle vir groei
2. ‘n Paar nuwe selle bly meristematies
3. Sommige selle differensieër en bly permanent

, Struktuur Funksies
Enkellaag diggepakte selle Bedek + beskerm plant
Dun selwande Ketikula voorkom watverlies
Sommige dele is met ketikula Sommige epidermale selle is aangepas bv. ‘n
bedek (was-agtige laag) wortelhaar vergroot die oppervlak vir die absorpsie van
water, huidmondjies/stomata vir gaswisseling.




Vul die ruimtes tussen die vaatweefsel en dermale weefsel van die plant.




Struktuur
 Dunwandig
 Baie sye
 Groot vakuole
 Los gepak
 Groot intersellulêre lugruimtes


Funksies
 Stoor voedsel + water
 Laat gaswisseling + die
beweging van stowwe deur
die plant plaasvind
 Tipe weefsel wat meeste in
plante voorkom.

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