Question

why double circulationis necessary in humans​

Answer 1

$\huge\bf\star\fbox\red{Answer:-}$

The natural environment or natural world encompasses all living and non-living things occurring naturally, meaning in this case not artificial. The term is most often applied to the Earth or some parts of Earth.

$\large\bold\pink{Answered By Ayush8378 }$

=================•✠•================

Answer 2

Answer:

It is necessary for a human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system more efficient and maintains constant body temperature.