Thin film coating the skin; made up of a mixture of sweat, sebum, desquamated cells and fragments, various chemicals, microorganisms; protects skin

Superficial primary layer of the skin; made up entirely of keratinized stratified squamous epithelium; derived from the ectoderm; also includes hairs, sweat glands, sebaceous glands

Stratum Corneum (Horny Layer)

Several layers of flakelike dead cells (or corneocytes) mostly made up of dense networks of keratin fibers cemented by glycophospholipids and forming a tough, waterproof barrier; the keratinized layer; sulcus (groove), friction ridge

Stratum Lucidum (Clear Layer)

A few layers of squamous cells filled with eleidin - a keratin precursor that gives this layer a translucent quality (not visible in thin skin)

Stratum Granulosum (Granular Layer)

2-5 layers of dying, somewhat flattened cells filled with darkly staining keratohyalin granules and multilayered bodies of glycophospholipids; nuclei disappear in this layer

Stratum Spinosum (Spiny Layer)

8-10 layers of cells pulled by desmosomes into a spiny appearance

Stratum Basale (Base Layer)

Single layer of mostly columnar cells capable of mitotic cell division; it is from this layer that all cells of superficial layers are derived; includes keratinocytes and some melanocytes

Dermoepidermal Junction (DEJ)

The basement membrane, a unique and complex arrangement of adhesive components that glue the epidermis and dermis together

Deep primary layer of the skin; made up of fibrous tissue; also includes some blood and lymphatic vessels, muscles, and nerves; derived from mesoderm

Loose fibrous tissue with collagenous and elastic fibers; forms nipplelike bumps (papillae); includes tactile corpuscles (touch receptors) and other sensory receptors

Tough network (reticulum) of collagenous dense irregular fibrous tissue (with some elastic fibers); forms most of the dermis

Hypodermis (subcutaneous layer; superficial fascia)

Loose fibrous (areolar) connective tissue and adipose tissue; under the skin; includes fibrous bands or skin ligaments that connect the skin strongly to underlying structures; includes lamellar corpuscles (pressure receptors) and other sensory receptors

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Tyler Bastian

StudyStack #1 (Skin Layers)

Term	Definition
Surface Film	Thin film coating the skin; made up of a mixture of sweat, sebum, desquamated cells and fragments, various chemicals, microorganisms; protects skin
Epidermis	Superficial primary layer of the skin; made up entirely of keratinized stratified squamous epithelium; derived from the ectoderm; also includes hairs, sweat glands, sebaceous glands
Stratum Corneum (Horny Layer)	Several layers of flakelike dead cells (or corneocytes) mostly made up of dense networks of keratin fibers cemented by glycophospholipids and forming a tough, waterproof barrier; the keratinized layer; sulcus (groove), friction ridge
Stratum Lucidum (Clear Layer)	A few layers of squamous cells filled with eleidin - a keratin precursor that gives this layer a translucent quality (not visible in thin skin)
Stratum Granulosum (Granular Layer)	2-5 layers of dying, somewhat flattened cells filled with darkly staining keratohyalin granules and multilayered bodies of glycophospholipids; nuclei disappear in this layer
Stratum Spinosum (Spiny Layer)	8-10 layers of cells pulled by desmosomes into a spiny appearance
Stratum Basale (Base Layer)	Single layer of mostly columnar cells capable of mitotic cell division; it is from this layer that all cells of superficial layers are derived; includes keratinocytes and some melanocytes
Dermoepidermal Junction (DEJ)	The basement membrane, a unique and complex arrangement of adhesive components that glue the epidermis and dermis together
Dermis	Deep primary layer of the skin; made up of fibrous tissue; also includes some blood and lymphatic vessels, muscles, and nerves; derived from mesoderm
Papillary Layer	Loose fibrous tissue with collagenous and elastic fibers; forms nipplelike bumps (papillae); includes tactile corpuscles (touch receptors) and other sensory receptors
Reticular Layer	Tough network (reticulum) of collagenous dense irregular fibrous tissue (with some elastic fibers); forms most of the dermis
Hypodermis (subcutaneous layer; superficial fascia)	Loose fibrous (areolar) connective tissue and adipose tissue; under the skin; includes fibrous bands or skin ligaments that connect the skin strongly to underlying structures; includes lamellar corpuscles (pressure receptors) and other sensory receptors

Created by: tylerbastian3

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