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24 hours
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30 minutes after last activity
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2 years after last activity
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18 months
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2 years
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Used by Google Analytics to determine which links on a page are being clicked
30 seconds
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ID used to identify users
2 years
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Contains information related to marketing campaigns of the user. These are shared with Google AdWords / Google Ads when the Google Ads and Google Analytics accounts are linked together.
90 days
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2 years after last activity
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10 minutes
MT30-Histology Art AB 4 years, 5 months ago 
The integumentary system: anatomy, physiology and function of skin – PubMedThis article, which forms part of the life sciences series, examines the anatomy and physiology of skin, also termed the integumentary system. Skin is composed of two main layers, the epidermis and dermis. The structure of the epidermis and dermis are described and their functions are discussed. Acc …
The integumentary system includes the epidermis, dermis, hypodermis, associated glands, hair, and nails. In addition to its barrier function, this system performs many intricate functions such as body temperature regulation, cell fluid maintenance, synthesis of Vitamin D, and detection of stimuli.
Physical protection: Given that the integumentary is the covering of the human body, its most apparent function is physical protection. The skin itself is a tightly knit network of cells, with each layer contributing to its strength. The epidermis has an outermost layer created by layers of dead keratin that can withstand wear and tear of the outer environment, while the dermis provides the epidermis with blood supply and has nerves that bring danger to attention amongst other functions.
The skin is the body’s first line of defense as it acts as the physical barrier that prevents direct entry of pathogens. Cells are connected through junction proteins with reinforcement by keratin filaments.