Is it possible to compare the water vascular system of echinoderms with the circulatory system of man in some aspects.?Justify your answer.

Dear student,
Please find below the solution to the asked query

The water vascular system of echinoderms is totally different in structure and complexity from the circulatory system of man. However, they perform some similar functions and hence they can be compared with each other only in some aspects and these may be:

1. Water vascular system is made of tubes or channels which are very simple in structure while the human circulatory system consists of blood vessels which are complex in structure. But their function is same i.e transportation. 
2. The water vascular system helps in the distribution of respiratory gases and nutrients throughout the body in echinoderms. The circulatory system in humans also helps in the distribution of respiratory gases and nutrients in human body.

Hope this information will clear your doubts about the water vascular system of echinoderms and circulatory system of man.
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