to treat the callus, you decide to shave off some of the excess epidermis. while doing this, you notice that there is no pain or bleeding. why wouldnt it cause pain to remove only the superficial part of the epidermis? why wouldnt it bleed?

the superficial part of the epidermis, the stratum corneum, consist entirely of dead cells and has no pain receptors. the epidermis also lacks blood vessels. it would therefore cause no pain or bleeding to remove part of the dermis

Explanation:

a1 = unhealthy

a2= healthy

a3= healthy