Dermis – Contains vessels, nerves, sebaceous, eccrine, apocrine glands, hair follicles, and connective tissue (such as collagen) Papillary layer thin layer of connective tissue, generates fingerprints – Reticula Layer thick layer of connective tissue making most of the dermis – Epidermis Stratums basale nucleated and highly mitotic, contains melanocytes – Stratum spinosum some mitosis, some minor keratinization, lends strength – Stratum Granulosum start of keratin formation in earnest – Stratum Lucidum only in hands and feet, a dead thin layer of keratinized cells – Stratum corneum anucleated and dead, keratinized, water proofing – Cells in the Integumentary System Merkel sensory cells that interact with the nerves in the ddermis – Keratinocytes the majority of cells in the epidermis produce keratin as a barrier to – – water and protect Langerhorn Cells the skins immune cells, involved with responding to – allergens/pathogens/injury Melanocytes found deep in the dermis, responsible for producing types of melanin – that act as a shield for ultraviolet light, cause the skin to have color
Dermis – Contains vessels, nerves, sebaceous, eccrine, apocrine glands, hair follicles, and connective tissue (such as collagen) Papillary layer – thin layer of connective tissue, generates fingerprints Reticula Layer – thick layer of connective tissue making most of the dermis Epidermis Stratums basale – nucleated and highly mitotic, contains melanocytes Stratum spinosum – some mitosis, some minor keratinization, lends strength Stratum Granulosum – start of keratin formation in earnest Stratum Lucidum – only in hands and feet, a dead thin layer of keratinized cells Stratum corneum – anucleated and dead, keratinized, water proofing Cells in the Integumentary System Merkel – sensory cells that interact with the nerves in the ddermis Keratinocytes – the majority of cells in the epidermis – produce keratin as a barrier to water and protect Langerhorn Cells – the skins immune cells, involved with responding to allergens/pathogens/injury Melanocytes – found deep in the dermis, responsible for producing types of melanin that act as a shield for ultraviolet light, cause the skin to have color
anatomy_tissue_and_integumentary_review.docx