Segmented Worm: The segmented worms, like the earthworm, are more advanced in their construction than flatworms as they possess a complete digestive tract with an anus to allow undigested matter to pass from the body. They also have a circulatory system including hearts that pump the blood through the system and also have an excretory system to rid the body of toxic products of respiration.
Starfish: The starfish has radial canals that go through all the legs and join in the center to make the water vascular system that functions as a circulatory system, waste removal and more.
Grasshopper: Grasshoppers have open circulatory systems, with most of the body fluid filling body cavities and appendages. The one closed organ, the dorsal vessel, extends from the head through the thorax to the hind end. It is a continuous tube with two regions: the heart, which is restricted to the abdomen; and the aorta, which extends from the heart to the head through the thorax.
Starfish: The starfish has radial canals that go through all the legs and join in the center to make the water vascular system that functions as a circulatory system, waste removal and more.Grasshopper: Grasshoppers have open circulatory systems, with most of the body fluid filling body cavities and appendages. The one closed organ, the dorsal vessel, extends from the head through the thorax to the hind end. It is a continuous tube with two regions: the heart, which is restricted to the abdomen; and the aorta, which extends from the heart to the head through the thorax.
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