1) Label any 4 parts in the given diagram.
(II) What are the two functions represented in this diagram?
(III) What is double circulation in human beings? Why is it necessary?
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double circulation:
The human circulatory system has three key components: blood vessels, blood and the heart. It is called a double circulatory system because blood passes through the heart twice per circuit. The right pump sends deoxygenated blood to the lungs where it becomes oxygenated and returns back to the heart.
It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.
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