Specialized structures of the cell that extend the cell membrane and project out from the cell surface.

Synonyms: Protrusions, Cell Surface, Cell Surface Extensions, Projections, Cell Surface, Extension, Cell Membrane, Protrusion, Cellular, Cell Membrane Protrusion, Cell Surface Protrusion, Cellular Protrusion, Cellular Protrusions, Surface Protrusion, Cell, Surface Projection, Cell, Protrusion, Cell Membrane, Cell Surface Extension, Surface Extensions, Cell, Cell Surface Protrusions, Surface Protrusions, Cell, Membrane Projections, Cell, Extension, Cell Surface, Cell Surface Projections, Cell Membrane Projection, Protrusions, Cellular, Cell Membrane Protrusions, Protrusion, Cell Surface, Extensions, Cell Membrane, Membrane Protrusions, Cell, Membrane Extension, Cell, Protrusions, Cell Membrane, Cell Membrane Extensions, Cell Membrane Projections, Cell Surface Projection, Surface Projections, Cell, Extensions, Cell Surface, Projections, Cell Membrane, Membrane Protrusion, Cell, Membrane Projection, Cell, Surface Extension, Cell, Membrane Extensions, Cell, Projection, Cell Surface, Projection, Cell Membrane, Cell Membrane Extension