internal respiration

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The metabolic process by which living cells absorb oxygen and release carbon dioxide.

The mechanism of gaseous exchange between blood and tissues.

The exchange of gases between the tissues and the blood. Compare cellular respiration, external respiration.

The interchange of gases that occurs between the blood and the tissues. Also called internal respiration.

The noun has one meaning:

Meaning #1: the metabolic processes whereby certain organisms obtain energy from organic moelcules; processes that take place in the cells and tissues during which energy is released and carbon dioxide is produced and absorbed by the blood to be transported to the lungs
  Synonyms: respiration, cellular respiration