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Jan 2
The circulatory system in prawns is an open circulatory system. It consists of a heart, blood vessels, and hemolymph (a fluid similar to blood). The heart pumps the hemolymph into the body cavity, where it bathes the organs and tissues. The hemolymph then returns to the heart through the blood vessels, completing the circulatory loop.
On the other hand, echinoderms, such as starfish and sea urchins, have a water vascular system. This system is unique to echinoderms and is involved in locomotion, respiration, and feeding. It consists of a network of fluid-filled canals and tube feet. The water vascular system is filled with seawater, which is drawn in through a sieve-like structure called the madreporite. The water is then circulated through the canals and tube feet, allowing the echinoderm to move and perform various functions.
On the other hand, echinoderms, such as starfish and sea urchins, have a water vascular system. This system is unique to echinoderms and is involved in locomotion, respiration, and feeding. It consists of a network of fluid-filled canals and tube feet. The water vascular system is filled with seawater, which is drawn in through a sieve-like structure called the madreporite. The water is then circulated through the canals and tube feet, allowing the echinoderm to move and perform various functions.
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