Answer in brief. Distinguish between external and internal respiration.
Answers
Answer:
Difference between External Respiration and Internal Respiration
Location:
External respiration occurs between cells of the body and the external environment while internal respiration occurs within cells.
Breathing:
External respiration involves breathing, while internal respiration does not.
Involvement of Hemoglobin:
External respiration involves oxygen attaching to or offloading from the heme of hemoglobin. This is not an internal respiration process.
Oxidation:
Internal respiration involves three stages: glycolysis, Krebs cycle and oxidative phosphorylation; this is not the case for external respiration.
Involvement of Oxygen:
Internal respiration can sometimes occur without oxygen, this is not the case with external respiration.
Entrance:
External respiration involves oxygen first entering the ventilatory structures such as lungs or gills; this is not the case with internal respiration.
Chemical Reaction:
External respiration is the mechanism of how oxygen physically enters the body and is moved around, while internal respiration is only a process of chemical reactions which involves oxygen as a driving force.
Gas Exchange:
External respiration involves gas exchange, internal respiration does not.
Involvement of Water vs. Oxyhemoglobin:
Internal respiration involves protons eventually combining with oxygen to form water while in external respiration oxygen combines with hemoglobin to form oxyhemoglobin.
Explanation:
Brief
Answer:
External respiration : it refers to the gas exchange across the respiratory membrane of lungs.
Internal respiration : oxygen diffuses out from the blood into tissue during internal respiration.