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Red arrows indicate secreted lamellar bodies, and green arrows indicate lamellar bodies in the cytoplasm. Scale bar = 200 nm. In cell biology, lamellar bodies (otherwise known as lamellar granules, membrane-coating granules (MCGs), keratinosomes or Odland bodies) are secretory organelles found in type II alveolar cells in the lungs, and in keratinocytes in the skin.
A lamella (pl.: lamellae) in biology refers to a thin layer, membrane or plate of tissue. [1] This is a very broad definition, and can refer to many different structures. Any thin layer of organic tissue can be called a lamella and there is a wide array of functions an individual layer can serve.
The Pacinian corpuscle (also lamellar corpuscle, or Vater-Pacini corpuscle) [1] is a low-threshold mechanoreceptor responsive to vibration or pressure, found in the skin and other internal organs. [2] In the skin it is one of the four main types of cutaneous receptors.
Type II cells (granulous pneumocytes) in the alveolar wall contain secretory organelles known as lamellar bodies or lamellar granules, that fuse with the cell membranes and secrete pulmonary surfactant. This surfactant is a film of fatty substances, a group of phospholipids that reduce alveolar surface tension. The phospholipids are stored in ...
They are characteristic of actively growing cells, including many functions in genetic information transfer and storage. They are probably formed from the nuclear envelope. [3] [4] Similar membranes are found in both the cytoplasm and nucleoplasm. In the nucleoplasm, they are small, irregular, and short-lived.
Multi-Lamellar Emulsion (MLE) is an oil-in-water (O/W) emulsion showing multi-lamellar structure and an original technology developed by NeoPharm in South Korea. MLE is made with NeoPharm's proprietary pseudo-ceramide, PC-9S. The Lamellar structure, also observed in the stratum corneum, is defined as a thin plate or membrane of skin lipids. MLE ...
The eyespot apparatus of Euglena comprises the paraflagellar body connecting the eyespot to the flagellum. In electron microscopy , the eyespot apparatus appears as a highly ordered lamellar structure formed by membranous rods in a helical arrangement.
Similarly to its function in organizing tubular myelin, SP-B arranges lipids into the lamellar body structure. [6] Basically, SP-B plays a role in the organogenesis (formation of structure) of lamellar bodies. The lamellar bodies are then secreted into the fluid lining the interior of alveoli, and become tubular myelin.