Which of the following are the two phases of aerobic respiration?

Internal respiration and cellular respiration are the two major phases of aerobic respiration. 

Internal respiration refers to the exchange of gases between the blood and tissues, whereas cellular respiration refers to the metabolic process that occurs within cells to generate energy.

Internal respiration involves the transport of oxygen from the lungs to the tissues and organs via the bloodstream, as well as the transport of carbon dioxide from the tissues and organs to the lungs for exhalation. 

During cellular respiration, oxygen is used to convert glucose into energy, and carbon dioxide is produced as a byproduct. Both phases are required for the production of energy via aerobic respiration and are critical for cell survival and function.