Cross-section of human skin from stratum corneum to hypodermis, with all key structures, functions, and age-related changes annotated by layer.
A free, animated skin layers anatomy you can read here or embed on any website, from Scrollchart.
Skin Layers Anatomy
The skin is the largest organ, accounting for ~15% of body weight. It is organized into three primary zones: the epidermis (barrier and immune surveillance), dermis (structural scaffold and vascular supply), and hypodermis (thermal insulation and mechanical cushioning).
Each layer contains specialized cell types with distinct functions that change measurably with age, UV exposure, nutritional status, and metabolic health.
Stratum corneum: dead keratinocytes embedded in a lipid matrix (ceramides, fatty acids, cholesterol). Provides the primary moisture barrier. Thinned by aging, UV damage, and detergent over-washing.
Stratum granulosum/spinosum: living keratinocytes forming lamellar bodies and desmosomes. Spinosum contains Langerhans cells (epidermal immune sentinels).
Stratum basale: proliferating keratinocyte stem cells and melanocytes. Renewal rate ~28 days in youth, ~45-60 days in old age. Melanocytes decrease ~10-20% per decade in sun-exposed skin.
Dermis: 90% type I collagen synthesized by fibroblasts, elastin for recoil, hyaluronic acid for hydration. Collagen production declines ~1% per year after early adulthood. Blood vessels, lymphatics, and nerve endings supply and monitor all skin layers.
Hypodermis: lobulated adipocyte clusters for insulation, cushioning, and local hormone production. Fat redistributes with age, particularly in the face where volume loss is most visible.
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Source & accuracy
This skin layers anatomy is an editorial illustration built to represent the concept accurately. Where it shows figures, they are typical or representative values chosen to make the relationship clear, not a single underlying dataset. The diagram and its explainer are reviewed and maintained centrally, and updated over time as understanding improves.
From the surface down to the fat
The epidermis is the outermost layer, topped by the stratum corneum of flattened dead cells that forms the main barrier against water loss and pathogens. Beneath it the living epidermal layers continually produce new keratinocytes, alongside pigment-producing melanocytes and immune Langerhans cells. The dermis below holds collagen and elastin for strength and elasticity, plus blood vessels, nerves, hair follicles, and sweat and sebaceous glands. The deepest layer, the hypodermis, is mostly fat that cushions and insulates.
Each layer has a distinct job, so the cross-section reads as a stack of functions: barrier at the top, structure and sensation in the middle, and energy storage and padding at the base.
How the layers change with age
With age the epidermis thins and cell turnover slows, the dermis loses collagen and elastin so skin becomes less firm and more wrinkled, and the hypodermal fat redistributes. Reduced gland activity tends to leave older skin drier. These are general patterns and vary widely between individuals.
This is general educational information, not medical advice. Any skin change of concern, such as a new or evolving lesion, should be assessed by a qualified healthcare professional.
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Reference
What this is
A free, embeddable, animated skin layers anatomy for any website.
Who uses it
Medical educators, Patient-info sites, Health blogs, Wellness sites.
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License
Free forever. Editorial explainer text included; updated centrally over time.
Copy the universal HTML snippet, the WordPress shortcode, or an iframe fallback -
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Frequently asked questions
Where can I get a free animated "Skin Layers Anatomy" for my website?
Scrollchart provides "Skin Layers Anatomy" as a free, embeddable animated diagram you can add to any website with one line of HTML. No signup is required and there is no watermark. The diagram and its explainer text are served from scrollchart.com, so the embed stays current without any maintenance on your end.
How do I embed a skin layers anatomy diagram in a health or wellness blog?
Copy the HTML snippet from the Scrollchart diagram page and paste it into any post or page in your CMS. It works in WordPress, Webflow, Ghost, Substack, and plain HTML without any plugin or account. The diagram renders as animated SVG directly in your page, so search engines can index the accompanying explainer text.