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-as of [2 MARCH 2025]–
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-the standard [human fingernail] is [1 CM] wide-
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-a nail is a ‘horn-like envelope’ covering the ‘tips’ of the [‘fingers’ / ‘toes’] in most ‘primates’ and a few other ‘mammals’-
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(‘nails’ are similar to ‘claws’ in other animals)
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(‘fingernails’ + ‘toenails’ are made of a tough protective protein called ‘keratin’)
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(this protein is also found in the ‘hooves’ + ‘horns’ of different ‘animals’)
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*the top white part of the ‘finger-nail’ is the ‘free edge’*
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*SKETCHES*
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☜*“THE INTEGUMENTARY SYSTEM”* ☞ 
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