Stratum spinosum
AnatomicalStructureThe stratum spinosum is the epidermal layer where strong desmosomal junctions form, keratinocytes begin differentiation, and Langerhans cells survey for antigens.
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34 entities found starting with S Clear filters
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Subcutaneous tissue
AnatomicalStructureMetabolically active deepest skin layer whose ageing drives inflammageing through adipocyte senescence. Target of cryolipolysis, cavitation, HIEMT, RF, and injection lipolysis.
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Substance P
ChemicalSubstanceSubstance P is an 11‑amino‑acid neuropeptide that drives neurogenic inflammation, itch, pain, mast‑cell activation, and stress‑linked hair shedding via NK1 receptor signalling in skin.
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Sunscreen active ingredients
ChemicalSubstanceSunscreen actives divide into mineral and chemical filters. The clinically meaningful distinction is systemic absorption, not UV mechanism — both primarily absorb UV radiation.