URL：https://static.vecteezy.com/system/resources/previews/019/153/480/original/amoeba-with-nucleus-and-vacuole-illustration-of-simplest-unicellular-animal-vector.jpg
掲載元：https://www.vecteezy.com/vector-art/19153480-amoeba-with-nucleus-and-vacuole-vector-illustration-of-simplest-unicellular-animal
