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Aortic arches

Earthworm dissection showing aortic arches.

Most earthworm species have five aortic arches or ‘hearts’ that move blood around the body. The number of aortic arches varies amongst species.

Acknowledgement: Sara L Roggemann, Three Flowers Photography

Rights: Sara L Roggemann, Three Flowers Photography
Published:12 June 2012Size: 25.09 KB