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| Keywords: Anatomy of an earthworm 001.png en Cross section of the body of an earthworm Oligochaeta showing the disposition of the more important organs the body wall w consists of dermis circular and longitudinal muscles; the body cavity is divided by membranes c into a series of chambers in each of which opens the mouth of a coiled nephridium n ; the axis of the cavity is occupied by the intestine i ; above and below it is a longer blood vessel v and below it is also the central nerve cord nc 1901 http //www biodiversitylibrary org/item/112021 page/1/mode/1up A Guide to the shell and starfish galleries of the British Museum p 123 British Museum Custom license marker 2012 02 27 PD-old Uploaded with UploadWizard Oligochaeta anatomy | ||||
