Question

Define internal and external respiration.

Answer 1

EXTERNAL RESPIRATION occurs in the lungs where oxygen diffuses into the alveolar air.

INTERNAL RESPIRATION occurs in the metabolizing tissues where oxygen diffuses out of the blood and Carbon dioxide diffuses out of the cell.

Answer 2

Answer:

Definition. Internal Respiration: Internal respiration refers to the gas exchange across the respiratory membrane in the. metabolizing tissues. External Respiration: External respiration refers to the gas exchange across the respiratory membrane of lungs. Oxygen Exchanging Direction.