Definition of external respiration
: exchange of gases between the external environment and a distributing system of the animal body (such as the lungs of higher vertebrates or the tracheal tubes of insects) or between the alveoli of the lungs and the blood — compare internal respiration
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“External respiration.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/external%20respiration. Accessed 24 May. 2022.
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Time Traveler for external respiration
The first known use of external respiration was in 1940
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