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EXAMEN ANIMALS PART 2 BIOLOGIA PRIMER QUATRIMESTRE

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August 25, 2022
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TEMA 8.2. LES PLANTES
1. SISTEMES I TIPUS DE TEIXITS VEGETALS

La planta te 3 òrgans principals: les fulles, les arrels i tija.




1.1. SISTEMA DÈRMIC: extern: protector
1.2.SISTEMA INTERN O VASCULAR:

Floema: tub que condueix la saba elaborada

Xilema: tub que condueix la saba bruta

1.3. SISTEMA FONAMENTAL: entre el primer i el segon

Resta de la planta: El sistema fonamental inclou teixits que duen a terme diferents
funcions: fotosíntesis, reserva i sosteniment.

Hi hem d’afegir els teixits embrionari o meristemes: son els responsables que les plantes
creixin en longitud i gruix.

, RESUM: TEIXITS VEGETALS




Nota: Quan la planta te mes d’una any l’epidermis cau i es substituïda per el peridermis
( tronc)

Nota: el parènquima duu a terme funcions com la fotosíntesis i reserva

Nota: el colènquima i esclerènquima duen a terme funcions d’esquelet.




Nota: al centre ja no arriba la llum, hi ha un parènquima de reserva que emmagatzema midó.
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