Purple onion skin. (Macro) (Click picture for larger view)
"A cat has nine lives, as the onion seven skins." ~ ProverbThe thin outer skin of a purple onion, so delicate with branching veins and variegated colors. Any skin seems so vulnerable, yet it's waterproof and a barrier to microbes and insects in the soil. Human skin, only a few microscopic layers in thickness is the first line of defense against bacteria, blocks excessive fluid loss and keeps bulkier muscles, tendons and bones in place and protected. Unlike the onion we don't have seven skins, just one; so don't forget the sunscreen!!!!
Submission for MacroDay topic "skin". (end of post)