insect anatomy. sticker head human louse. pediculus humanus capitis. sketch of louse

agent anatomy animal arthropoda avian blood body book bug capitis cartoon clipart coloring danger debris disease drawn ectoparasites exopterygota hand head host human humanus illustration insect insecta label lice louse mammalian neoptera outline pale parasit parasite parthenogenetic pediculus phthiraptera pterygota scalp scavengers sebaceous secretions sketch skin sticker structure vector wingless