A Level Biology Revision “The Structure and Functions of Xylem”

A Level Biology Revision “The Structure and Functions of Xylem”
A Level Biology Revision “The Structure and Functions of Xylem”

Author: Freesciencelessons via YouTube
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A Level Biology Revision “The Structure and Functions of Xylem”

In this video, we look at the structure and functions of xylem. First I show you how xylem vessels are formed and discuss the role of xylem vessels. We look at the function of lignin within the xylem vessel walls. We then look at xylem fibres and parenchyma cells.

Image credits:

Xylem vessels with lignin rings
https://commons.wikimedia.org/wiki/File:Xylem_vessels_in_developing_Coleus_shoot_(35105390750).jpg
Berkshire Community College Bioscience Image Library, CC0, via Wikimedia Commons

Xylem Vessels
https://commons.wikimedia.org/wiki/File:Herbaceous_Dicot_Stem_Tangential_Section_Bicollateral_Vascular_Bundle_in_Cucurbita_(35555419016).jpg
Berkshire Community College Bioscience Image Library, CC0, via Wikimedia Commons

Xylem fibres
https://commons.wikimedia.org/wiki/File:Woody_Dicot_Stem_Tangential_Section_Quercus_100x_(35760482536).jpg
Berkshire Community College Bioscience Image Library, CC0, via Wikimedia Commons

Large image of root cells
https://commons.wikimedia.org/wiki/File:Herbaceous_Dicot_Root_Mature_Ranunculus_(35613585260).jpg
Berkshire Community College Bioscience Image Library, CC0, via Wikimedia Commons

Stem vascular bundles
https://commons.wikimedia.org/wiki/File:Herbaceous_Dicot_Stem_Older_Helianthus_(35022512084).jpg
Berkshire Community College Bioscience Image Library, CC0, via Wikimedia Commons

Leaf vascular bundle
https://commons.wikimedia.org/wiki/File:Angiosperm_Morphology_Midrib_Tissues_in_Ligustrum_Leaf_(36198194954).jpg
Berkshire Community College Bioscience Image Library, CC0, via Wikimedia Commons

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A Level Biology Revision “The Structure and Functions of Xylem”
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