Collagen reduction and what are the main causes for skin photoaging?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Collagen reduction and what are the main causes for skin photoaging?

AQP3 is regulated by EGF-induced ___ and wound healing. 

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sun releases UVA and UVB rays which damage skin and leads to ageing . it is quite often that our age is accelerated by sun exposure .actually, our skin is composed of 3 layers - 1. epidermis 2. dermis 3. subcutaneous tissue 

the dermis part of skin contain many protein including collagen and elastin .These protein get destroyed due to harmful rays which result in decreased elasticity of skin and ageing occur.

It is to be noted that sometime exposure to UVB and UVA rays may cause  other skin issues like skin cancer.

The collagen  reduction also occur due to growing age. As we grow older the structural integrity of skin decline. (please refer to diagram in next section) 

many institute claims that 80 percent of our ageing is due to sun rays.

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