bud clean cotton ear earwax hygiene rod stick swab blue absorbent balls cleaning cleansing cosmetics cotton-balls cotton-fabric cotton-wool-balls cotton-wool-pads first-aid fluffy gentle medical medical-care padding purified skin-care soft surface surfaces surfacing swabbing tactile texture textured textures thick wad wadding wads white white-cotton-wool wound-care analyse backdrop background bacteria blood blood analysis cells clusters concept contamination culture disease disinfect fungus germs graphic green health health care illness immune immune system immunity infection medicine microbes microscopic sample science sickness slides tissue unclean virus color colour pink probiotics system red