Which of the following is found in an earthwo | vedclass

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(B) In the earthworm ($Pheretima$ $posthuma$),the circulatory system is of the closed type. It consists of blood vessels,capillaries,and hearts. There

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Lateral hearts

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(B) In the earthworm ($Pheretima$ $posthuma$),the circulatory system is of the closed type. It consists of blood vessels,capillaries,and hearts. There are four pairs of tubular hearts in segments $7, 9, 12,$ and $13$. The hearts in segments $7$ and $9$ are known as lateral hearts,while those in segments $12$ and $13$ are known as lateral-oesophageal hearts. Therefore,lateral hearts are a characteristic feature of the earthworm's circulatory system.

Which of the following is found in an earthworm?

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