Body fluids of eumetazoan animals are separated into fluid "compartments." Name these compartments and explain how compartmentalization may differ in animals with open and closed circulatory systems.

QUESTION 3:  Explain the flow of water through the water vascular system of the starfish.

The mammalian circulatory system includes a four- chambered heart and a double-loop circulation. How do the four chambers of the heart relate to the two circulatory loops?

Crustaceans, like annelids, are segmented animals. But crustaceans unlike annelids have tagmata. What are two advantages and two disadvantages to this type of segmentation in comparison to annelids?

What structures play a role in protecting vertebrate central nervous tissue?

What is the alternativemeans for transport ofsubstances in animals withouta circulatory system? Why isblood important for largeranimals?

does earthworms have a closed or open circulatory system?

(2) Salt water is denser than fresh water – based on this information and your knowledge of how swim bladders work, do you expect marine fishes to have larger or smaller swim bladders than freshwater fishes? Please explain your answer.

name three different molecules synthesized by the cells of vertabrates and briefly state each one's biological function

How is circulationcharacterized in mammals?