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  • Rights: Sara L Roggemann, Three Flowers Photography Published 12 June 2012, Updated 23 March 2017 Size: 40 KB Referencing Hub media

    The dorsal blood vessel runs along the length of the upper side of the earthworm. It contracts and pumps blood to the aortic arches. The ventral blood vessel runs along the lower length of the earthworm.

    Acknowledgement: Sara L Roggemann, Three Flowers Photography

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