1. Please help The water vascular system of Sea Stars (Class Asteroidea) and the hemal system of solitary tunicates (Class Ascidiacea) are both systems that transport fluid throughout the body in the...

1. Please help The water vascular system of Sea Stars (Class Asteroidea) and the hemal system of solitary tunicates (Class Ascidiacea) are both systems that transport fluid throughout the body in the course of accomplishing a number of different functions yet they are distinctly different with respect to their structure and in general how they accomplish these functions.  Your task is to identify two functions that both these systems address and then identify one similarity and one difference in the way they perform this function.  Focus on the way in which the system functions rather than difference in the actual structure between these systems (eg. one is a coelomic system and the other is not).  So to summarize - two functions and for each one way the operate in a similar fashion and one way they operate differently (= 2 similarities abnd 2 differences).