parasites : this 19th-century medical engraving shows two classic human intestinal parasites that were heavily studied in parasitology at the time:1. lumbricoid worm (left) – ascaris lumbricoides..2. tapeworm (right) – taenia solium (pork tapeworm) - 捕食線蟲真菌 幅插畫檔、美工圖案、卡通及圖標