<u>Respiration</u>is not considered to be an animal behavior.
<h3>What is Respiration?</h3>
The respiratory system, also known as the respiration or ventilatory system, is a biological system in both plants and animals that consists of a variety of organs and structures that are employed for gas exchange.
Depending on the organism's size, environment, and evolutionary background, the anatomy and physiology that cause respiration vary widely.
In land animals, the respiratory surface is internalized as the lining of the lungs.
Gas exchange in the lungs takes place in millions of tiny air sacs, known as alveoli in mammals and reptiles and atria in birds.
The air is in close touch with the blood in these tiny air sacs because they have an abundant blood supply.
To learn more about respiration from the given link
Answer: This is because animals (like humans) have more organelles to store in our bodies than bacteria. This makes sense because without all of our organelles we wouldn't be able to function properly. This is just another one of those form=function things.
