Define closed circulatory system
Define closed circulatory system?
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A closed circulatory system is one in which blood circulates merely within blood vessels. For this reason the blood pressure is more in animals with closed circulatory system. The cellularity of the blood is too higher with numerous specific blood cells.
The closed circulatory system is a characteristic of annelids, cephalopod molluscs and vertebrates.
Give a brief explanation of direct immuno fluorescence.
Black Codes were the laws passed by the southern government which imposed severe restrictions on freed slaves. They were not permitted to vote.They were also not allowed to carry weapons in public places.They were forced to work in certain occupations
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Name the kind of circulatory system existed in annelids?
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