Hey there!
So gaseous exchange is the process of swapping one gas for another in the alveoli of the lungs.
3 reasons why it is important is because it gives the body the ability to eliminate carbon dioxide, replenish oxygen, and it is required for survival.
If this was to brief, please see further down for maybe more information.
How does gas exchange happen in lungs?
Simple passive diffusion.
As they attempt to reach equilibrium between the partial pressure of each gas in the alveolus (a tiny air sac) and the partial pressure of each gas dissolved in pulmonary capillary blood entering the lung, O2 and CO2 readily diffuse through cellular membranes. As a result, almost equal amounts of oxygen and CO2 diffuse from the lung to the blood.
How can the process of gas exchange be explained?
All mammals, birds, reptiles, and amphibians have hemoglobin in their blood. Oxygen replaces the carbon dioxide bound to the haemoglobin molecule as an animal breathes in. Haemoglobin has the valuable capacity to release carbon dioxide and absorb oxygen when the partial pressure of oxygen is higher, while doing the opposite when the partial pressure of oxygen is lower, as far as I can tell, and it has been 40 years since I took "A" level biology. Because air (typically) contains a significant excess of oxygen over carbon dioxide, blood moves to the lungs where it excretes carbon dioxide. Through the aerobic citric acid cycle, oxygen is reacted by metabolism in the body's tissues to produce carbon dioxide. Red blood cells give up oxygen to the tissues, thus when the oxygenated blood enters the tissues, carbon dioxide is transported from the tissue to the hemoglobin in the red blood cells.
Another way of saying it:
Diverse gases are naturally exchanged across a certain respiratory surface through a process known as gas trading. A functional framework for their commerce is essential since gases are constantly needed by cells and metabolic processes and given as a by-product. It is related to breathing in living things and to photosynthesis in plants as well. In order for cells to function properly when breathing, waste carbon dioxide (CO2) must be expelled, but during photosynthesis, CO2 enters plants and O 2 is released. Gas atoms move from a range of high fixation to low fixation as a result of dispersion down a focal angle, which essentially causes the trading of gases.
Thank you, I hope this helped.
- Eddie
