<h2><strong>Collenchyma Tissue </strong></h2>
<p>Collenchyma is a simple, permanent tissue typically found in the shoots and <a data-lesson="leaf-arrangement-and-leaf-form" data-subject="biology" data-tutorial="plant-form-and-physiology" href="https://app.ulearngo.com/biology/plant-form-and-physiology/leaf-arrangement-and-leaf-form">leaves</a> of plants. Collenchyma cells are thin-walled but the corners of the <a data-lesson="cell-wall" data-subject="biology" data-tutorial="introducing-the-cell" href="https://app.ulearngo.com/biology/introducing-the-cell/cell-wall">cell wall</a> are thickened with cellulose. This tissue gives strength, particularly in growing shoots and leaves due to the thickened corners. The cells are tightly packed and have fewer inter-cellular spaces.</p>
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<td colspan="2">Collenchyma</td>
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<td><b>Diagram</b></td>
<td><b>Micrograph</b></td>
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<td>
<div class="wp-caption alignnone" style="width: 306px"><img alt="collenchyma" height="245" src="https://data.ulearngo.com/assets/ef5d8e64-364f-43d9-a458-4c764d29f705" width="306"/><p class="wp-caption-text">Collenchyma cells are thin walled with lignified corners.</p></div>
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<td>
<div class="wp-caption alignnone" style="width: 306px"><img alt="collenchyma-micrograph" height="228" src="https://data.ulearngo.com/assets/60ff72ec-43ba-4ab4-b1d9-5172899a05e8" width="306"/><p class="wp-caption-text">Light microscope image of collenchyma cells.</p></div>
</td>
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</tbody>
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<td colspan="2">Collenchyma</td>
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<td><em>Structure</em></td>
<td><em>Function</em></td>
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<td>Cells are spherical, oval or polygonal in shape with no intercellular spaces.</td>
<td>This allows for close packing to provide structural support.</td>
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<td>Corners of cell wall are thickened, with cellulose and pectin deposits.</td>
<td>Provides mechanical strength.</td>
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<td>Cells are thin-walled on most sides.</td>
<td>Provides flexibility, allowing <a data-lesson="summarizing-asexual-reproduction" data-subject="biology" data-tutorial="plant-reproduction" href="https://app.ulearngo.com/biology/plant-reproduction/summarizing-asexual-reproduction">plant</a> to bend in the wind.</td>
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</tbody>
</table>
<div>
<div class="ns-tutorial">
<div class="ns-school-defn2">
<h3>Fact:</h3>
<div>
<ul>
<li>Collenchyma <a data-lesson="complex-tissue-structure" data-subject="biology" data-tutorial="introducing-animal-diversity" href="https://app.ulearngo.com/biology/introducing-animal-diversity/complex-tissue-structure">tissues</a> make up the strong strands observed in stalks of celery.</li>
<li>The <a data-lesson="population-growth-patterns" data-subject="biology" data-tutorial="ecology-overview" href="https://app.ulearngo.com/biology/ecology-overview/population-growth-patterns">growth</a> of collenchyma tissue is affected by mechanical stress on a plant. For instance if the plant is constantly shaken by the <a data-lesson="pollination-by-wind" data-subject="biology" data-tutorial="plant-reproduction" href="https://app.ulearngo.com/biology/plant-reproduction/pollination-by-wind">wind</a> the walls of collenchyma may be 40–100% thicker than those that are not shaken.</li>
</ul>
</div>
</div>
</div>
<h2>Video: Simple Permanent Tissues</h2>
<p>Learn more about permanent simple tissues in this optional video below.</p>
<iframe allowfullscreen="allowfullscreen" frameborder="0" height="360" src="https://www.youtube.com/embed/szDQS7FNGUI?rel=0&amp;modestbranding=1&amp;cc_lang_pref=en&amp;cc_load_policy=1" width="640"></iframe></div>

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Collenchyma Tissue

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Collenchyma Tissue

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