Question

The circulatory system in humans undergoes a switch over process. (i) Identify the stage at which it takes place.
(ii) Mention the importance of this.​

Answer 1

Answer:

Humans in the animal kingdom, show the highest levels of specialization. In fact, birds and mammals show a specialized feature called as the double circulatory. If you have guessed that this has something to do with the circulatory system, you are bang on target.