Question

Hi
please help me
I m giving so many points just in in exchange of 5 words so please give appropriate answers don't write that you don't know
whosoever gives the first answer I will mark him as the Brainliest ​

Answer 1

Answer:

This means that during a single cycle, the blood goes twice in the heart. ... This double circulatory system is important because it ensures provision of oxygenated blood to the muscle and not a mixture of oxygenated and de-oxygenated blood. Hence, this system ensures efficient supply of oxygenated blood to the muscles.