Cross section of epidermis
BIODIDAC (copyright holder)
The copying of material, either with modifications or adaptations, and its subsequent distribution, is permitted with three conditions: that it is not used for commercial purposes, that the source of the material is clearly indicated, and that its use is recorded in such a way that BIODIDAC can provide documentation to the sponsors of the project. [Aiming for CC BY-NC-SA 3.0]
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