set of hand drawn radiosa amoebas. sketch outline microbiology , black on white background

ameba amoeba amoebas anatomy animal background biology black cell contour doodle drawing drawn education graphic grunge hand health healthcare icon illustration ink isolated laboratory line medical medicine membrane micro microbe microbiology microorganism microscope microscopic nature nucleus organism outline proteus protozoan pseudopod radiosa science set silhouette sketch small structure unicellular vacuole vector white