INTEGUMENTERY SYSTEM
INTEGUMENTERY SYSTEM MISCELLENOUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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flat, dead cells
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melanin
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collagen
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healthy, living cells
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Detailed explanation-1: -Stratum corneum, 20-30 cell layers, is the uppermost layer, made up of keratin and horny scales made up of dead keratinocytes, known as anucleate squamous cells.
Detailed explanation-2: -There are two layers of epidermis, the living basal layer, which is next to the dermis, and the external stratum corneum, or horny layer, which is composed of dead, keratin-filled cells that have migrated outward from the basal layer. The melanocytes, responsible for skin colour, are found in the basal cells.
Detailed explanation-3: -Remember that there are no blood vessels in the epidermis so the cells get their nutrients by diffusion from the connective tissue below, therefore the cells of this outermost layer are dead. Stratum Corneum cells flake off.