Leaf Structure and Functions

Vocabulary flashcards covering the external and internal structures of a leaf and their specific functions.

Midrib

Keeps the leaf in an upright position.

Petiole

Connects the leaf blade to the stem and acts as a transport medium for water and mineral ions to the leaf.

Leaf blade

Provides a large surface area for light absorption.

Cuticle

Reduces water evaporation from the leaf.

Upper epidermis

Allows light and water to pass through.

Palisade cells

The layer where most photosynthesis takes place because it contains a large amount of chloroplasts.

Chloroplasts

Organelles that absorb the light energy needed for photosynthesis.

Spongy mesophyll cells

Cells with large air spaces for air circulation that allow carbon dioxide and oxygen gas to diffuse in and out of the leaf.