Biology - External structure of a leaf

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7 Terms

1
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Blade or lamina

Broad portion of the leaf which conducts photosynthesis by providing a large surface area for sunlight absorption.

<p>Broad portion of the leaf which conducts photosynthesis by providing a large surface area for sunlight absorption. </p>
2
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Apex

Leaf tip helps capture sunlight and allows the leaf to take in carbon dioxide.

<p>Leaf tip helps capture sunlight and allows the leaf to take in carbon dioxide. </p>
3
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Margin

Leaf edge boundary area, which helps to reduce water loss.

<p>Leaf edge boundary area, which helps to reduce water loss.</p>
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Veins

Vascular tissue bundle that supports the leaf and transports nutrients.

<p>Vascular tissue bundle that supports the leaf and transports nutrients.</p>
5
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Mildrib

Central main vain arising from secondary veins.

<p>Central main vain arising from secondary veins.</p>
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Base

Area of the leaf that connects the blade to the petiole.

<p>Area of the leaf that connects the blade to the petiole.</p>
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Petiole

Thin stalk that attaches the leaf to a stem, provides a flexible handle that enables the blade to twist in the wind.

<p>Thin stalk that attaches the leaf to a stem, provides a flexible handle that enables the blade to twist in the wind.</p>