Check your Understanding 1. You develop a callus, which is a thickening of the e

Question

Check your Understanding 1. You develop a callus, which is a thickening of the epidermis, from a pair of i- fitting shoes. a. 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 wouldn't it cause pain to remove only the superficial part of the epidermis? Why wouldn't it bleed? b. Unfortunately, you go a bid overboard and feel a sudden pinch, after which you notice you are bleeding. What has happened? Are you still in the epidermis? Explain.

Explanation / Answer

A.callus is an area if thickened area formed as the result of friction , pressure or any other means .mostly callus develop on the meet due to frequent walking and incorrectly fitted shoes .

The epidermis will not pain because the outer epidermis is contained with the dead cells .The keratinocytes in outer epidermis are dead.

IT will not bleed because it does not contains blood vessels. Epidermis lacks blood vessels. It gets nutrients by the process of diffusion .

B.

If you are bleeding it means that you have crossed the epidermis and have pricked the dermis. DERMIS the layer after epidermis contains blood vessels. It means your dermis is exposed and so it bleeds .

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