The Body Cavities of Arthropods and Annelids Are Fundamentally Different

The body cavities of arthropods and annelids are fundamentally different.Which of the following statements are accurate comparisons? Check all that apply.

A) The body cavity of an annelid is a coelom that develops by the splitting of mesodermal blocks in the early embryo.The body cavity of an arthropod is a hemocoel that develops from the embryonic blastocoel.
B) Annelids lack a hemocoel and arthropods lack any coelomic cavity.
C) Fluids in the hemocoel of arthropods serve functions related to the arthropod's open circulatory system.Coelomic fluids in annelids aid in distributing wastes and nutrients but are most important in the formation of hydrostatic compartments.Annelids have a closed circulatory system,and arthropods have an exoskeleton for support.
D) Because annelids are lophotrochozoans and arthropods are ecdysozoans,one would expect few developmental similarities,in the two groups.Thus,the body cavities present in these phyla are fundamentally different.