蚯蚓有多少个心脏?A

There are earthworms as short as one-twenty-fifth of an inch and earthworms as long as 11 feet。 The earthworm has no lungs; it breathes through its skin。 Some earthworms have as many as ten hearts。
有的蚯蚓很短,只有1/25英寸,有的蚯蚓很长,达11英尺。蚯蚓没有肺,通过皮肤呼吸,有的蚯蚓有多达10颗心脏。