Skin 101
Start with the foundation. Learn how the skin is structured, what each layer does, and why the skin is so important to the human body.
Meet your skin.
Your skin is the body's largest organ. It helps protect your body from the outside environment, helps regulate temperature, allows you to sense your surroundings, and acts as an important protective barrier.
Three layers.
The skin is commonly described as having three major layers. Each layer has different structures and functions, but they work together as one system.
Epidermis
The outermost layer of skin. It forms much of the body's protective barrier and contains cells involved in protection.
Dermis
The layer beneath the epidermis. It contains structures including blood vessels, nerves, sweat glands, and hair follicles.
Hypodermis
The deepest of these three layers. It contains connective tissue and fat that help cushion the body and provide insulation.
Skin is
a barrier.
One of the skin's most important roles is to create a barrier between your body and the outside environment. The barrier helps protect the body while also helping maintain the body's internal environment.
Quick quiz.
Answer each question to finish Skin 101. Your answers will lock after you select one.
Which layer is the outermost layer of skin?
Which layer contains blood vessels, nerves, sweat glands, and hair follicles?
What is one major job of the skin?
Which is the deepest of the three major skin layers?
Lesson complete.
You finished Skin 101. Keep exploring dermatology and medicine with Pre-Derm Society.
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