The Epidermis: Layers definitions Flashcards

The outermost layer of skin composed of several distinct layers of cells.

The deepest epidermal layer containing stem cells, keratinocytes, melanocytes, and tactile epithelial cells.

The second deepest layer with dividing keratinocytes and dendritic cells, known for its spiny appearance.

The third layer where keratinocytes stop dividing, harden, and begin to die.

A clear, protective layer found only in thick skin, consisting of dead keratinocytes.

The most superficial layer, consisting of dead, keratin-filled cells that are regularly shed.

Cells that produce keratin, originating in the stratum basale and moving upwards.

Cells in the stratum basale that produce melanin to protect skin from UV damage.

Cells in the stratum basale that work with nervous tissue to allow touch sensations.

Immune cells in the stratum spinosum that activate the immune system.

Granules in the stratum granulosum that help with keratin aggregation and cell hardening.

Granules containing glycolipids that waterproof the stratum granulosum.

Skin type lacking the stratum lucidum, containing hair follicles and oil glands.

Skin type with all epidermal layers, including the stratum lucidum, found on palms and soles.

A tough, fibrous protein produced by keratinocytes, providing skin with protective properties.