Question

What are the differences between external respiration and internal respiration?

Answer 1

The differences between external and internal respiration includes:

• Oxygen is taken inside and carbon dioxide is released into the air through the alveoli of the lungs in external respiration. In internal respiration oxygen moves from the blood and reaches the tissues for the metabolic functioning of the cell whereas carbon-dioxide moves from the tissues into the blood and then moves out of the body.
• In external respiration pH is high during the exchange of the gases in the lungs and temperature is lower in the lungs whereas in internal respiration pH is lower and temperature is higher.
• In external respiration partial pressure of oxygen determines its transport in the alveoli of the lungs and in internal respiration the metabolism takes place inside the cells with exchange of gases between the interstitial fluid and cell
• External respiration takes place during the exchange of the gases at the surface of the lungs and alveoli whereas in internal respiration takes place inside the cells utilizing energy from mitochondria for the metabolism of the cells with oxygen transport taking place in the hemoglobin pigment of the cells.