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1.1 Gas Exchange Gas exchange is the process by which atmospheric oxygen (O 2) is transferred from the alveolar gas into the bloodstream and carbon dioxide (CO 2) from the blood-stream into the alveolar gas phase. CO 2 is then eliminated into the atmosphere by ventilation. Gas exchange occurs at the level of the transitional and respiratory
Gas exchange occurs at two sites in the body: in the lungs, where oxygen is picked up and carbon dioxide is released at the respiratory membrane, and at the tissues, where oxygen is released and carbon dioxide is picked up. External respiration is the exchange of gases with the external environment, and occurs in the alveoli of the lungs.
Gas exchange surface - where gas enters and leaves the lungs. Single-celled organisms can use their cell membrane as a surface for gas exchange. Many organisms have developed specialised gas exchange structures called lungs.
Gas exchange takes place continuously between the blood and cells throughout the body, and also between the blood and the air inside the lungs. Gas exchange in the lungs takes place in alveoli, which are tiny air sacs surrounded by networks of capillaries.
Diagram Of Gas Exchange In The Lungs: Pulmonary Gas Exchange G. Kim Prisk,Susan R. Hopkins,2013-08-01 The lung receives the entire cardiac output from the right heart and must load oxygen onto and unload carbon dioxide from perfusing blood in the correct amounts to meet
The reason we have a lung is well known: to allow the exchange of gases between the air we breathe and the pulmonary capillary blood. We are primarily concerned with two gases, O2 and CO2, but what follows applies in concept to all gases (that are not chemically reactive with tissues).
The lungs contain a number of parts that facilitate the gas exchange. Trachea - It functions to funnel the inhaled air into the lungs, while also facilitating the removal of inhaled air out of the lungs.
