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