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Harold Peregrino posted an update in the group
Histology Art (MT 30 – I) 2022 4 years, 5 months ago Epidermis – stratified squamous keratinized epithelium divided into four strata (or layers).
Stratum Basale – single layer of germinal cells resting on the basement membrane which is attached to the dermis.
Stratum Spinosum – keratinocytes attached to each other by desmosomes on spiny processes.
Stratum Granulosum – keratinocytes with numerous basophilic granules in their cytoplasm.
Stratum Corneum – thin layer of dead cells devoid of nuclei and organelles.Dermis – dense irregular connective tissue that supports the epidermis.
Papillary Layer – papillae that project into the dermis.
Dermal Papillae – increase adhesion between the epidermis and dermis.
Papillary Capillaries – bring nutrients to the epidermis.Root Sheaths -comprised of two parts:
Internal Root Sheath – extends from the hair bulb to the level of sebaceous glands. It is divided into Huxley’s layer (inner layer of flattened cells) and Henle’s layer (outer single layer of cuboidal cells).
External Root Sheath – layers of cells continuous with the epidermis
Glassy membrane – thick basement membrane that separates the hair follicle from the dermis
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