epidermis: Quick Facts

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Photos and Videos

Detailed cross-section illustration of human skin showing layers including the epidermis, dermis, and subcutaneous fat, with labeled structures such as hair, pores, sweat gland, oil gland, nerves, blood vessels, and hair follicle.

Arthropod integument

development of a down feather

Cross-section diagram of human skin showing burn depth by degree, with arrows indicating that first-degree burns affect only the epidermis, second-degree burns reach the dermis, third-degree burns extend into subcutaneous tissue, and fourth-degree burns penetrate to muscle.

fish scale development

Watch living epidermal cells near the dermis push old cells toward the skin surface to die and become keratin protein

How do moisturizers keep skin hydrated?

Inspect a cross-section of dermis and epidermis and see papillae, blood and lymph vessels, muscles, and nerves

Examine how a subcutaneous fat layer supplies nutrients to dense connective tissue and epithelial cells

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Topics

hair melanocyte nail Plumage hyaline layer protofeather keratinocyte stratum granulosum Merkel cell stratum germinativum dermis scale freckle

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Integument: Arthropods

Male muscle, man flexing arm, bicep curl.

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