An onion peel is typically one of the first samples viewed when introduced to school-level microscopy. Here are images of an onion skin under my Foldscope. The cells are seen very distinctly and have a three-dimensional appearance.



<figure class="wp-block-image">
 <img alt="Living Cells, Dead Cells" class="wp-image-197450 gcloudimg" data-attachment-id="197450" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"1595430332","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"1"}' data-image-title="Living Cells, Dead Cells" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_197449/Living-Cells-Dead-Cells.jpg"/>
</figure>


<figure class="wp-block-image">
 <img alt="Nucleus, Cytoplasm, Dead Cells, Cell Wall" class="wp-image-197451 gcloudimg" data-attachment-id="197451" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}' data-image-title="Nucleus, Cytoplasm, Dead Cells, Cell Wall" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_197449/Nucleus-Cytoplasm-Dead-Cells-Cell-Wall.jpg"/>
</figure>


<figure class="wp-block-image">
 <img alt="Cell Wall" class="wp-image-197452 gcloudimg" data-attachment-id="197452" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"1595431084","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"1"}' data-image-title="Cell Wall" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_197449/Cell-Wall.jpg"/>
</figure>


<figure class="wp-block-image">
 <img alt="Dead Cells, Cell Wall" class="wp-image-197453 gcloudimg" data-attachment-id="197453" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"1595430114","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"1"}' data-image-title="Dead Cells, Cell Wall" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_197449/Dead-Cells-Cell-Wall.jpg"/>
</figure>


<figure class="wp-block-image">
 <img alt="Overlapping Layers 1" class="wp-image-197454 gcloudimg" data-attachment-id="197454" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"1595430648","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"1"}' data-image-title="Overlapping Layers 1" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_197449/Overlapping-Layers-1.jpg"/>
</figure>


<figure class="wp-block-image">
 <img alt="Overlapping Layers 2" class="wp-image-197455 gcloudimg" data-attachment-id="197455" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}' data-image-title="Overlapping Layers 2" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_197449/Overlapping-Layers-2.jpg"/>
</figure>





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