ZOO102
St. Edm
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Echinodermata: Comparative study of water-vascular system
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---5April 20252024/2025
- Water-vascular system is a division of the coelom and most distinctive feature of echinoderms. lt 
is a system of canals and appendages of body wall. It is also termed as ambulacral system. Since 
the entire system is derived from coelom, the canals are lined with a ciliated epithelium and 
filled with watery fluid. Water-vascular system functions as a means of locomotion. It consists of 
madreporite or sieve plate, stone canal, water ring or ring canal, radial canals and podia or 
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