| http://www.w3.org/ns/prov#value | - These antennae are attached to the head, which has a flat protective plate covering it. [8] They have an open circulatory system [9] and their heart is a blood vessel that has chambers and that is located in the dorsal (rear) region of the body. [10] [11] Animals that have open circulatory systems don???t have true hearts but use a blood vessel to pump blood.
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