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The human skin is the largest organ of the body and acts as a protective barrier against injuries, germs, and harmful substances. On average, skin is about 2 millimeters (mm) thick, though thickness varies in different areas. For example, the skin on the eyelids is very thin, while the soles of the feet and palms have thicker skin to handle pressure and friction.
Skin has three main layers:
Epidermis – the outer layer that protects the body and prevents water loss.
Dermis – the middle layer containing blood vessels, nerves, sweat glands, and hair follicles.
Hypodermis (subcutaneous layer) – the innermost layer made of fat and connective tissue, which cushions the body and stores energy.
The 2mm thickness allows the skin to protect internal organs, regulate body temperature, and sense touch, pressure, and pain. It also helps in immune defense, acting as the first line of protection against bacteria and viruses.
Other options are incorrect:
2cm and 3cm are far too thick for human skin.
3mm is slightly higher than the average in most body areas.
Understanding skin thickness is important in biology, especially in human anatomy, physiology, and dermatology. It explains how the skin functions as a barrier, a sensory organ, and a regulator of temperature.
In short, human skin is about 2mm thick, providing a strong, flexible, and protective layer essential for health and daily functioning.
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