Which of the following pairs has open type of circulatory system? A)Earthworm and Leech B)Man and Whale C)Cockroach and Silverfish D)Tadpole larva and Fish
Option C) The open circulatory system is common to mollusks and arthropods. Open circulatory systems pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells. Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood. Cockroaches and silverfish have an open circulatory system. They don't have any blood vessels.