Question
What do you call a circulatory system where blood flows through tubes called blood vessels?
What do you call a circulatory system where blood flows through tubes called blood vessels?
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Solution
The correct option is B Closed circulatory system
A circulatory system is said to be closed when the blood flows only through a network of blood vessels, like in humans. The open circulatory system is present in animals like cockroaches where blood flows through the body cavity. No blood vessels are present in these animals.
Closed circulatory system
A circulatory system is said to be closed when the blood flows only through a network of blood vessels, like in humans. The open circulatory system is present in animals like cockroaches where blood flows through the body cavity. No blood vessels are present in these animals.
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