Question

differentiate between external and internal respiration

Answer 1

EXTERNAL RESPIRATION -

it is a physiological process
it takes place along the respiratory surface along the lungs
also known as breathing
it is a process during which oxygen is taken up by capillaries of lung alveoli and carbon dioxide is released from blood.


INTERNAL RESPIRATION -

it is a biological process
takes place within the cells( i.e.., at cellular level)
it is the process in which  oxygen is released to tissues or living cells and carbon dioxide is absorbed by the blood.

Answer 2

External respiration or breathing - It is a mechanical process that involves inhaling air rich in oxygen to the lungs and exhaling air rich in carbon dioxide from the lungs to the air.

Internal or cellular respiration - It is a biochemical process which involves oxidation of glucose to release energy, with carbon dioxide and water as by - products.