outline illutration amoeba proteus, zoolgy science art

ameba amoeba anatomy animal background biology black care cell contour cytoplasm decorative doodle drawing drawn dysentery education endoplasmic graphic hand health illustration isolated laboratory line medical medicine membrane micro microbe microbiology microorganism microscope microscopic nucleus organelle organism outline protista protozoa protozoan pseudopod pseudopodia science silhouette small structure unicellular vacuole vector zoology