usta

usta

Front opening of the digestive tract, into which food is taken for digestion. In flatworms, the mouth is the only opening into the digestive cavity, and is located on the "belly" of the worm.

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行业/领域：生物学
类别动物学
Company: 伯克利
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行业/领域：动物类别蛇

kobra

A highly venomous snake from the elapidae family native to Asia and Africa. When alarmed, a cobra raises its head and expands the skin of the neck to ...