Lamellar cells aren't directly mentioned in the provided reference; however, the reference does describe lamellar bodies, which are key components of specific cell types. Therefore, we'll address the question of what structures are associated with lamellar bodies. Lamellar bodies exist within certain cell types and play crucial roles.
Lamellar Bodies: Key Secretory Organelles
Lamellar bodies (also known as lamellar granules, membrane-coating granules (MCGs), keratinosomes or Odland bodies) are secretory organelles. These structures are found within two primary cell types:
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Type II Alveolar Cells (Lungs): These cells are responsible for producing and secreting surfactant, a substance that reduces surface tension in the alveoli, preventing them from collapsing. Lamellar bodies store and release this surfactant.
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Keratinocytes (Skin): In the skin, keratinocytes use lamellar bodies to secrete lipids and other substances that form a water-repellent barrier in the stratum corneum (the outermost layer of the skin). This barrier is crucial for preventing dehydration and protecting against external aggressors.
In summary, while "lamellar cells" isn't a specific term, it's understood that lamellar bodies are essential organelles within alveolar type II cells in the lungs and keratinocytes in the skin, each contributing to vital functions within their respective tissues.
