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.
State various advantages of closed circulatory system over open circulatory system?
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Nostril: It is present within the nose and above the mouth it is regionated anteroposteriorly into the vestibule, respiratory channel and olfactory organs. The cartilaginous nasal septum splits the vestibule into two lateral half. The respiratory chan
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