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What would have happened if humans had not developed a circulatory system?
Wiki User
∙ 10y ago
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
Wiki User
∙ 10y ago
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What is the difference between a crayfish circulatory system and a humans circulatory system?
A crayfish has an open circulatory system while humans have a closed circulatory system. "Closed" means that we have true blood vessels that carry blood to and from the heart. "Open" means that the organs are simply bathed in blood that freely circulates around the body. Sometimes the heart can move the "blood" by creating pressure waves in the fluid.
Is your circulatory system open or closed?
A humans circulatory system is closed. Large creatures tend to have a closed system, while smaller creatures like insects and crustaceans have open circulatory systems. Closed is when there are vessels and the blood stays there. Open is when blood floats around the body. Hope it helps:)
Do humans have open or closed circulatory system's?
they have a closed circulatory sytsem:]yur welcome..... Sorry, this answer is very incorrect. A closed circulatory system means that the blood is contained within blood vessels, which the heart is able to pump/move through the tissues for very efficient gas exchange. Sponges DO NOT have this. In fact sponges do not even technically have a circulatory system at all, gas exchange is achieved by diffusion from the outer cells. So this means that sponges do not have an open or a closed circulatory system, because they don't have one at all.
Do single cell organisms have circulatory system like humans?
No it gets what it needs from it's environment
Does a salmon have an open circulatory system?
No. All vertebrates have a closed circulatory system. Arthropods and molluskshave an open circulatory system.
What is the similarity between a fish's circulatory system and humans circulatory?
Both are close circulatory system.
What type of Circulatory system is found in humans?
mammals have closed circulatory system and further double circulatory system.
What system do plants have the same as humans?
circulatory system
What type of circulatory system do African lions have?
Their circulartion system is very similar to humans (closed circulatory system)
Do humans have an opened or closed circulatory system?
Humans have a closed circulatory system, in which blood is pumped by the heart through dedicated vessels, where it stays contained, as opposed to an open circulatory system (usually found in invertebrates) where blood is pumped out of the heart and vessels.
What kind of circulatory system do humans have?
a closed one
Do humans have a double loop circulatory system?
YES.
Do tigers have a open or closed circulatory system?
Tigers are mammals and so their circulatory system is very similar to that of humans.
What is so special about the circulatory system?
The circulatory system is important to humans because the main components are the heart, the blood, and blood vessels.
Do humans have a double circulatory system?
yes areteries and veins
When do humans use their circulatory system?
each and every moment.
What is a good sentence using the word circulatory?
Humans have the most advanced blood and fluid circulatory system.
