Sunday, March 28, 2004

Annelid, External features

The body of an annelid is often described as a tube within a tube. The inner tube, or digestive tract, is separated from the outer tube, or body wall, by the coelom. The head region (prostomium) is followed by a series of segments similar to each other in appearance. The body in many species, especially in the sedentary polychaetes, is separated into two or three regions. The

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