skinspleen皮膚脾ppt課件-wenkub
2023-01-20 03:30:44 本頁(yè)面
【正文】 hair papilla epithelial root sheath connective tissue sheath Skin appendages IV. 1. Hair LGR5 and LGR6 indicate different stemcell populations along hair follicles. Stem cells (green), nuclei (grey) and hair follicles (red) are shown in confocal pictures (left) and in the cartoon panels (second from the left). Lineage tracing reveals the actual stemness of a population. LGR5 stem cells generate progeny that repopulate the hair follicle (blue), whereas LGR6 stem cells predominantly generate progeny for sebaceous gland and IFE (blue) and, to a lesser extent, hair follicle (light blue). Transplantation of both stemcell populations reveals equal stemness potential towards all lineages (blue). EGFP, enhanced green fluorescent protein。 ⑤ Keratin: → + → ++。 hemidesmosome. 2. Stratum Spinosum（棘層） : LM: 510 layers, cuboidal EM: bundled . lamellar granules LM: 35 layers, polygonal. EM: Keratohyalin granules (no membrane) lamellar granules. 3. Stratum Granulosum（顆粒層） : 4. Stratum Lucidum（透明層） : LM: Eosinophilic, transparent. EM: Matrix of keratohyalin granules+ embedded bundled . = keratin. 5. Stratum Corneum（角質(zhì)層） : LM: Acidophilic, continuously shed. EM: Full of keratin, thickened membrane, degenerated desmosomes (surface layers). Conclusion: The changes of the keratinized cells from Stratum
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