multilamellar bodies Dr.Jastrow's EM-Atlas

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Overview lamellar bodies (LB; Corpuscula multilamellaria):
Pages with explanations are linked to the text below the images if available


pneumocyte type II with LB and surfactant (rat)	LB of a pneumocyte type II (rat)	Detail thereof	pneumocyte type II + LB (rat) 1	pneumocyte type II + LB (rat) 2	pneumocyte type II + LB (rat) 3


idem detail (rat)	other detail (rat)	lammellar body (rat)	other LB (rat)	lamellar body from a Pneumocte (rat)	LB of a Clau- dius cell (rat)


LB of a rat granulosalutein cell	Overview thereof	LB of a rat liver cell	formation of a LB (human plasma cell)	LB in the extracellular space pharyngeal tonsil (human)	Syncythiotrophoblast with LB (human placenta)	detail 1	detail 2

Lamellar bodies (LB, Terminologia histologica: Corpuscula lamellariae) are round to oval cell organelles containing lots of thin electron dense lamellae.
When cut, LB have mean diameters of 0.2 to 1.5 µm. The matrix surrounding the strongly osmophilic lamellae is electron lucent and seems artificially stretched in many cases.
LB are limited by a double-membrane and are rich in lipoproteins due to the lamells contained. These lamelles are thinner than the outer double-membrane only a few nm in diameter.
LB are rare cell organelles. Only alveolar epithelial cells (= pnemocytes) of type 2 bear lots of them. It was shown that most MLB derive from multivesicular bodies in this cell type.
However LB can also result from alignment of membranes of the smooth endoplasmic reticulum or may derive from the Golgi-apparatus.
The LB of type 2 - pneumocytes in the lung deliver their content into the alveolar lumen where its lipoproteins contribute in formation of the surfactant.

--> smooth endoplasmic reticulum, multivesicular bodies, Golgi-apparatus, cytoplasm, lung, placenta
--> Electron microscopic atlas Overview
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