Difference between External and Internal Respiration | Zoology

The upcoming discussion will update you about the difference between external and internal respiration in animals. Difference # External Respiration: 1. It is a physical pro­cess in which oxygen (O2) is absorbed and carbon dioxide (CO2) is given out. 2. Enzymes do not play any role in the process. 3. Restricted to respi­ratory organs only. 4. Respiratory struc­tures are body [...]