They also secrete a yellow fluid to deter predatory flatworms.
来自BBC
Most flatworms are hermaphrodite and, in tapeworms, self - fertilization usually takes place.
大多数的扁虫雌雄同体, 绦虫常常进行自体受精.
This is the group of flatworms that cause schistosomiasis.
这是导致血吸虫病的扁形虫族群.
Schistosomiasis ( or bilharziasis ): Group of chronic disorders caused by parasitic flatworms of the genus Schistosoma ( blood flukes ) .
血吸虫 病: 由 血吸虫 属寄生的扁虫引起的慢性疾病.