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Sumario Tema 7: Sistemas de las plantas $6.91   Add to cart

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Sumario Tema 7: Sistemas de las plantas

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Resumen esquematizado, visual y traducción a español del los temas de biología sobre los sistemas de las plantas del Bachillerato internacional.

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  • Temas sobre los sistemas de las plantas
  • September 16, 2024
  • 9
  • 2023/2024
  • Summary
  • Secondary school
  • Bachillerato
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🪷 TEMA 7 🪷
Sistemas de plantas

, B3.1
- Intercambio gaseoso -
B3.1.7 Adaptaciones para el intercambio gaseoso en las hojas

La hoja, como el principal órgano fotosintetizador de las plantas, desempeña un papel crucial en el
intercambio gaseoso y la conservación del agua.

1. Cutícula Cerosa: La superficie exterior de la hoja está cubierta por una capa de cera llamada cutícula
cerosa. Esta capa es impermeable al agua y ayuda a reducir la pérdida de agua por transpiración.
2. Estomas: pequeños poros presentes en la epidermis de las hojas. Permiten el paso del CO2 para la
fotosíntesis y la liberación de O2. Durante la noche, los estomas suelen cerrarse para evitar la
pérdida de agua y mantener la eficiencia fotosintética.
3. Regulación de los estomas: controlan la apertura y cierre de los estomas. Si una planta está bajo
estrés hídrico o corre el riesgo de deshidratación, las células guardias cierran los estomas para
conservar agua.




B3.1.8 Distribución de tejidos en una hoja

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