Question

Whick part of the human body is more complex the heart or the circulatory system

Answer 1

Answer:

The heart is central to the circulatory system as it is the fist-sized pump that circulates the blood throughout the body. As animals became more complex and multicellular, the circulatory system evolved because simple diffusion was insufficient to supply all of the cells with nutrients.

Answer 2

Answer:

here is ur answer mate

Explanation:

The heart is central to the circulatory system as it is the fist-sized pump that circulates the blood throughout the body. As animals became more complex and multicellular, the circulatory system evolved because simple diffusion was insufficient to supply all of the cells with nutrients.

hope it will help u