IGNOU LSE 5 2016 - Open and closed circulatory systems

Question

Open and closed circulatory systems

21 Nov 2017

Answer :

Word Count : 277

Open Circulatory System

Open circulatory systems are the more basic type of circulatory system. They're referred to as open because blood is not contained within an enclosed circuit of vessels. Instead, blood flows from the heart through open-ended vessels and, when it reaches the end of the vessels, it flows directly over the tissues. While the tissues are bathed in blood, gas exchange occurs. Blood then freely flows back into vessels that direct the blood back to the

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