These then get snared in their alimentary canals, cannot be broken down by the animals' digestive enzymes and may ultimately kill them.

然后这些东西会陷入消化道，无法被动物的消化酶分，终可能致死。

As a consequence, such people are more than three times as likely as others are to develop serious alimentary canal disorders at some point in their lives.

因，和其他人相比，他们一生中患消化道疾病的可能性是前者的三倍。

Smooth muscles are used to control the flow of substances within the lumens of hollow organs, for examples, blood vessels and the alimentary canal, and are not consciously controlled.

平滑肌用于控制空腔器官内物质的流动，例如血管和消化道，且不受意识控制。