Question about Vertebrates with their closed circulatroy systems?

Question

typically have a blood volue that is 5-10% of the total body volume. Would you expect the precentage that blood volume constitutes of total body volume to be lower or higher in an enimal.such as a crayfish, that has an open circulatroy system..and why

Answer 1

The open circulatory system would not have blood in the first place. When the blood and coelomic fluids got mixed the term hemocoelomic fluid would be applied.If this were the case in man then you would have to add coelomic fluid to the 5 litres of blood already present. So, the total volume of the fluid to be pumped by the heart would be greater. You cannot compare this situation with a crayfish because the two fluids are permanently mixed.

Answer 2

there would be more blood volume in a vertebrate with an open circulatory system because the blood is not pumped by the heart so much in order to circulate throughout the entire body. in a closed circulatory system less blood is needed because the heart pumps the blood more forcefully, needing less blood to circulate the entire body.