has part has part microvillus Note that this term refers to a projection from a single cell, and should not be confused with 'microvillus' as used to refer to a multicellular structure such as that found in the placenta. Thin cylindrical membrane-covered projections on the surface of an animal cell containing a core bundle of actin filaments. Present in especially large numbers on the absorptive surface of intestinal cells. GO:0005902 microvilli Wikipedia:Microvillus NIF_Subcellular:sao671419673 actin filament bundle actin-based cell projection