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#histology #tissue layer #cell layer #thin section #microscope slide #biological lamina #lamina propria #nuclear lamina

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#integument #epidermis #outer layer #biological covering #tissue layer

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#biological tissue #cell layer #epidermis #tissue layer #microscopy #plant cell structure #onion skin

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#epithelial tissue #barrier function #tight junctions #cell junctions #tissue layer #protective lining #body covering