they are both alike because they have the same one
yes
Examples of organisms with open circulatory systems include arthropods, such as insects, spiders, and crustaceans. In these organisms, the circulatory system does not contain blood vessels; instead, the blood is pumped from the heart into body cavities where it directly bathes the tissues before returning to the heart.
they are both in our solar system
I don't know. You tell me.
earth worm, grasshopper cockroach,snail and molluscians
All the veins in your body can stretch twice around the earth.
Insects are an important factor of the eco-system. Insects are known to eat debris and food that is left so the Earth is not over run with waste products.
yes because the both are in the same solar system
Humans didn't develop a circulatory system. Early forms of circulatory systems developed in the first animals and organisms to roam the earth. As these species evolved through speciation and genetic variation, new species came to exist that also had circulatory systems. Over time, the systems became more complex and efficient (compare the cardiopulmonary circulatory system of the human compared to the circulation of a fish). Therefore, without circulatory systems there would be no humans nor would there be life as we know it
earth and venus are alike because they are both on the inner planets
An earthworm has a circulatory system consisting of four or more ventral blood vessels and one dorsal blood vessel that is also its heart. Most of the pumping of blood is performed by general muscular movements.
No, insects are natural to earth, they belong to the earth thus in no sense can insects invade earth.