16. What would be the consequences ol a ueicos nDescribe double circulation of blood in human beings. Why is it necessary?ht nthe dtferenees hrtween the transport of materials in xylem and phloem?17.erials in xylem and phloem?

16. What would be the consequences ol a ueicos nDescribe double circul

1.	16. What would be the consequences ol a ueicos nDescribe double circulation of blood in human beings. Why is it necessary?ht nthe dtferenees hrtween the transport of materials in xylem and phloem?17.erials in xylem and phloem?
Answer» During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system more efficient and helps in maintaining constant body temperature.