Lamellar granules (otherwise known as
membrane-coating granules (
MCGs),
lamellar bodies,
keratinosomes or
Odland bodies) are secretory
organelles found in type II
pneumocytes and
keratinocytes. They are oblong structures, appearing about 300-400 nm in width and 100-150 nm in length in
transmission electron microscopy images. Lamellar granules fuse with the cell membrane and release their contents into the extracellular space.