1. The urinary system cleans the blood in the circulatory system. Blood traveling back to the heart passes through the kidneys in the urinary system. The kidneys clean the blood and control the amount of salt, water, and other substances in the blood.
2&3.The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body. Air moves in and out of the lungs through the trachea, bronchi, and bronchioles. Blood moves in and out of the lungs through the pulmonary arteries and veins that connect to the heart.
4.The point is, without the respiratory system your blood would be useless. The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body.
No, only newborns should use ear tubes, because their ear holes are bigger than people from the ages between 50-65 because by the ages between 50-65 it would be too small for the tube to be able to go in.
