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What are the different layers of human skin?
How many layers of skin are there ? What does the different skin layers do? How do they function?
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Human skin consists of 3 layers. The epidermis is the outermost layer, followed by the dermis, and the hypodermis. The epidermis serves as one of the body's first lines of defense against infection, as well as playing a part in temperature regulation, and a “waterproofing” mechanism for the systems of the body.
The dermis is where you will find nerve endings, blood vessels, hair follicles, lymphatic vessels, sweat and apocrine glands. These blood vessels serve to deliver nutrients to the skin's cells, and additionally to remove waste products from the dermis and epidermis.
The hypodermis serves to connect the skin to the muscle and bone of the body, and contains the network of blood vessels and nerves. The fat that pads our bodies (some of us more than others) is also found here.
Source(s):
http://www.nlm.nih.gov/medlineplus/ency/imagepages/8912.htm
http://en.wikipedia.org/wiki/Human_skin#Epidermis
The dermis is where you will find nerve endings, blood vessels, hair follicles, lymphatic vessels, sweat and apocrine glands. These blood vessels serve to deliver nutrients to the skin's cells, and additionally to remove waste products from the dermis and epidermis.
The hypodermis serves to connect the skin to the muscle and bone of the body, and contains the network of blood vessels and nerves. The fat that pads our bodies (some of us more than others) is also found here.
Source(s):
http://www.nlm.nih.gov/medlineplus/ency/imagepages/8912.htm
http://en.wikipedia.org/wiki/Human_skin#Epidermis
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