Question

what is mean by internal respiration ?​

Answer 1

definition :

exchange of gases between cells and tissue fluid is called as internal respiration .

more information :

oxygen moves from blood into tissue fluid and carbon dioxide moves from tissue fluid into blood during internal respiration .

Answer 2

Medical Definition of internal respiration : the exchange of gases (as oxygen and carbon dioxide) between the cells of the body and the blood by way of the fluid bathing the cells — compare external respiration.