INTEGUMENTERY SYSTEM
DERMIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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epidermal ridges
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flexure lines
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collagen
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lymphatic vessels
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Detailed explanation-1: -Deep in the epidermis, lateral plate-derived mesenchymal cells proliferate to form dermis, which fills the space between the epidermal papilla. So, the epidermal ridges or fingerprints are probably caused by the dermal papillae.
Detailed explanation-2: -The papillae give the dermis a bumpy surface that interlocks with the epidermis above it, strengthening the connection between the two layers of skin. On the palms and soles, the papillae create epidermal ridges. Epidermal ridges on the fingers are commonly called fingerprints (see Figure 10.4.
Detailed explanation-3: -The papillary layer of the skin is responsible for fingerprints. The fingerprints are produced from a layer in the skin called the papillary layer, which is a layer within the dermal layer of skin.