C experiment because you can do experiments on people by giving them extra sugar to see who they react
Answer:
this is because the child's immunity system has improved and the child's immune system can fight all the know bacterias that were given through the antibiotics...
Answer:
The reason is because the heart requires more oxygen when exercising. Several physiological events happen to increase the blood flow and therefore oxygen flow to that muscles,including the heart.
Also the volume of blood that the heart pumps out is maintained so that the body organs receive the necessary amount of oxygen and nutrition, because if it didn't adjust the flow of blood to match activity level, you will be insufficient. Either output method will be lower than needed.
Liver function decrease and blodd pressure reduced
