Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 34 On the Nails

The nature of nails is rightful 7

The supreme Maker of things fashioned the hardness of the nails 8 (which are also considered barriers against hurt and fracture) most justly. If they were harder than they now are, they would have been created like a bone and would in that case have been more suitable for prehension as being unable to be bent or turned back; but they would have been very easily broken, like other things of a hard and brittle composition. And so the Maker of things provided for safety as well as strength in making them moderately hard so as not to impair any function for which they were created, nor be damaged on any trivial occasion when with their softness


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they easily break the impact of things striking them from outside, like cartilages. For this same reason they have a convex surface because with this shape they are better disposed for resisting injuries.



Book One -- The things that sustain and support the entire body, and what braces and attaches them all. [the bones and the ligaments that interconnect them] | Chapter 34 On the Nails