The Leaf as an Organ (Grade 10 NSC Matric Life Sciences): Flashcards
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Definition of an organ
Definition of an organ
Collection of tissues working together for specific jobs
Three main tissue types in leaves
Three main tissue types in leaves
Epidermis, mesophyll, vascular tissue
Function of epidermis in leaves
Function of epidermis in leaves
Protective outer covering; first line of defence
Function of mesophyll
Function of mesophyll
Main photosynthetic factory of the leaf
Characteristics of palisade layer
Characteristics of palisade layer
Tall, column-like cells tightly packed; upper mesophyll layer
Features of spongy mesophyll
Features of spongy mesophyll
Rounder cells, loosely arranged with air spaces
Function of xylem in leaves
Function of xylem in leaves
Transports water & minerals from roots to leaf tissues
Function of phloem in leaves
Function of phloem in leaves
Carries dissolved sugars from leaf to other plant parts
Role of stomata
Role of stomata
Microscopic pores allowing gas exchange
Function of guard cells
Function of guard cells
Change shape to open or close stomatal pores