Process which by plants and animals break down sugar and turn it into energy.
Purpose is it provides cells with the energy they need to function.
Answer:
Land vertebrates developed lungs, a new vein (the pulmonary vein) to take blood from them to the heart, and a double circulation, whereby the heart is effectively divided into two halves—one-half concerned with pumping incoming deoxygenated blood from the body to the lungs and the other with pumping oxygenated blood .
Explanation:
what's the question?I am confused is that the question or a statement
50%, in regards to volume, glial cells make up about half of our brain.
