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lamellar bone. (histology). Any bone with a microscopic structure consisting of thin layers or plates.1  Facebook. 2  Twitter.amellar bone. (histology). Any bone with a microscopic structure consisting of thin layers or plates. 1  Facebook. 2  Twitter.
The lamellipodium (plural lamellipodia) (from Latin Lamina - thin sheet, pod - foot) is a cytoskeletal protein actin projection on the leading edge of the cell.It contains a quasi-two-dimensional actin mesh; the whole structure propels the cell across a substrate (Alberts, et al., 2002).Within the lamellipodia are ribs of actin called microspikes, which, when they spread beyond the lamellipodium frontier, are called filopodia (Small, et al., 2002).rp2/3 complexes are present at microfilament-microfilament junctions in lamellipodia, and help create the actin meshwork. Arp 2/3 can only join onto previously existing microfilaments, but once bound it creates a site for the extension of new microfilaments, which creates branching (Weed, et al., 2000).