Question

All annelids and arthropods have a body plan. Unlike annelids, arthropods also have . The circulatory system of annelids is , while the circulatory system of arthropods is .

Answer 1

All annelids and arthropods have a body plan. Unlike annelids, arthropods also have a coelom, and a segmented body. The circulatory system of annelids is closed, while the circulatory system of arthropods is opened.

Arthropods are invertebrate organism that possess a stiff exoskeleton, a segmented body, and paired jointed appendages. Arthropods include insects, crustaceans, myriapods, and arachnids. Arthropods possess an open circulatory system; a system without blood vessels. The circulatory system of arthropods is made up of a tube (the heart), and an open hemocoel (in which the blood moves).

Annelids are invertebrate animals that have a body cavity, movable bristles, and a segmented body. Annelids include earthworms, and leeches. The circulatory system of annelids is closed; blood circulates through a closed system of blood vessels.

Answer 2

All annelids and arthropods have a SEGMENTED body plan. Unlike annelids, anthropoids have also have an EXOSKELETON. The circulatory system of annelids is CLOSED AND INCLUDES BLOOD VESSELS, while the circulatory system of arthropods is OPEN AND USES HEMOCYANIN.

Please correct if I'm wrong!