Some confusing terms starting with E...

Ok, some terms starting with "e" that are causing some confusion:

Epithelium/epithelial cells: Tissue that makes up the layer that covers the surface of organs, cavities, vessels and tubes in animals, like the surface of the gut (eg, villi of the ileum).

Endothelium:A type of epithelium that lines the inner surface of the blood vessels (eg, one cell thick capillary wall).

Epidermis/epidermal cells:Makes up the layer that covers the surface of plant parts, like the roots, stem and leaves as well as the surface of human skin (epidermal layer).

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