Rank the carbon dioxide level in each stage from highest to lowest

(1)External (pulmonary) respiration- Exchange of gases between the alveoli of the lungs and the blood in pulmonary capillaries across the respiratory membrane.  (2) Pulmonary Ventilation- inhalation and exhalation of air and happen the exchange of air between the atmosphere and the alveoli of the lungs (3) Internal (tissue) respiration-.capillaries and tissue cells. 

There are three types of respiration such as external which is pulmonary respiration that is interchange of vapors among the alveoli of the lungs and the blood in pulmonary capillaries beyond the respiratory membrane. Pulmonary Ventilation is the inhaling also exhaling of air and follow the replacement of air within the air and the alveoli of the lungs. Internal which is also known as tissue respiration that is between capillaries and tissue cells.

just go with your heart buddy