Histology: Skin

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A PowerPoint review of photomicrographs depicting the various histological features of skin. By Timothy Ballard, UNC Wilmington. Licensed under a Creative Commons License: Attribution Non-Commercial-NoDerivs. From http://www.lifescitrc.org/resource.cfm?submissionID=8988.

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<ul><li> 1. HHIISSTTOOLLOOGGYY RREEVVIIEEWWTThhee SSkkiinnDDrr.. TTiimm BBaallllaarrddDDeeppaarrttmmeenntt ooff BBiioollooggyy aanndd MMaarriinnee BBiioollooggyy</li></ul> <p> 2. SSkkiinn ggeenneerraall ffeeaattuurreessHuman skin H&amp;E 10x objectiveepidermisdermisThe arrowheads indicate the position of the basement membrane, separatingthe keratinized stratified squamous epithelium from the dermis below. 3. SSkkiinn ((tthhiinn)) -- eeppiiddeerrmmiissHuman skin H&amp;E 40x objectivestratum corneumstratum granulosumstratum spinosumstratum basaleThis is a section of thin skin, so the stratum lucidum is not present. 4. SSkkiinn ((tthhiinn)) -- eeppiiddeerrmmiissHuman skin H&amp;E 40x objectivestratum spinosum cells receivingmelanin from melanocytes andmoving towards the surfacestratum corneum multiple layers of deadsquamous cells filled with keratinstratum granulosum several layers of livingcells accumulating granules of keratohyalinestratum basale mitotic cells giving rise to thekeratinizing system with melanocytes scatteredaboutTo identify a melanocyte in the stratum basale, look for granules of brown-blackpigments in and around cells in this layer. 5. SSkkiinn -- ddeerrmmiissPig skin H&amp;E 10x objectiveepidermisdermispapillary dermisreticular dermisdermal papillaThe reticular dermis has a looser arrangement of fibers than does the papillarydermis. 6. SSkkiinn ddeerrmmiissHuman skin H&amp;E 4x objectiveepidermispapillary dermisdermisreticular dermisdermal papillasweat glandsIn this section the coiled tubular portions of eccrine sweat glands are seen inthe reticular dermis. 7. SSkkiinn eeccccrriinnee sswweeaatt ggllaannddssHuman skin H&amp;E 4x objectivesweat gland duct movingtowards the surfacesecretory portionsof sweat glandsEccrine sweat glands are simple coiled tubular glands. The secretory portionlies deep in the dermis. The duct is a straight tube that opens on the surface. 8. SSkkiinn sseebbaacceeoouuss ggllaannddssLip H&amp;E 4x objectivesebaceous glandsepidermishair folliclesSebaceous glands are oil (sebum) glands of mammalian skin, alwaysassociated with hair follicles. 9. SSkkiinn sseebbaacceeoouuss ggllaannddssLip H&amp;E 20x objectivehair folliclessebaceous glandThe gland is formed as a sac of cells that opens into a hair follicle. Thesecretion is called sebum.end 10. SSkkiinn sseebbaacceeoouuss ggllaannddssLip H&amp;E 20x objectivehair folliclessebaceous glandThe gland is formed as a sac of cells that opens into a hair follicle. Thesecretion is called sebum.end </p>