1. Tardigrade
  2. Question
  3. Biology
  4. External respiration occurs in the and internal respiration occurs in the .

Q. External respiration occurs in the ____________ and internal respiration occurs in the _________________.

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Solution:

External respiration occurs in the lungs where oxygen diffuses into the blood and carbon dioxide 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 cells.