Where does the carbon dioxide in breath come from?

The carbon dioxide is dissolved in the blood, carried to the lungs by the circulation, and breathed out. Every living cell of our body carries out the energy-releasing process of respiration, where glucose (a simple sugar) is slowly "burnt" (oxidised) to give off carbon dioxide (excreted through the lungs) and water

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.