1. Give an account of digestive system of Balanoglossus.
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In Balanoglossus, the alimentary canal is a straight tube. ... Between the mouth and anus, the alimentary canal can be distinguished into four regions– Buccal tube, Pharynx, Oesophagus, and Intestine. Their walls are composed of ciliated epithelium lined externally by basement membrane and devoid of muscle fibres.
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