WATER VASCULAR SYSTEM IN STARFISH. The madreporite gives rise to a short stone canal. The entire system is lined with ciliated epithelium. 28:47.
Water-vascular system definition is - a system of canals in echinoderms containing a circulating watery fluid that is used for the movement of the tentacles and tube feet. In Echinoderms a peculiar system is met with. Other articles where Water-vascular system is discussed: echinoderm: Water-vascular system: The water-vascular system, which functions in the movement of tube feet, is a characteristic feature of echinoderms, and evidence of its existence has been found in even the oldest fossil forms. Water vascular system and amulacral system of Echinodermata - Duration: 28:47. In the different classes, slight deviations from the basic plan are encountered. The variations are due to their adaptations to different modes of living. It is filled with sea water, it is called water vascular system or Ambulacral system.
This system is well developed in Asteroidea. Unlike other echinoderms, the madreporite of the holothuroideans is located internally below the pharynx and opens to the coelom instead of the outside world. The water vascular system controls the tube feet hydraulically through a complex of fluid filled canals and reservoirs. Bio Book Tag 39,615 views. Madreporite: In Asteroidea (Fig. Modifications of the Water Vascular System in Different Classes: The water vascular system is equally developed in all Echinoderms and has basically the same structural plan. It comprises an internal hydraulic system of canals and reservoirs containing a…
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