Table of Contents
How gases flow in the respiratory system?
Gas exchange takes place in the millions of alveoli in the lungs and the capillaries that envelop them. As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli.
How does air move through the respiratory system?
Breathing in They contract to pull your rib cage both upward and outward when you inhale. As your lungs expand, air is sucked in through your nose or mouth. The air travels down your windpipe and into your lungs. After passing through your bronchial tubes, the air travels to the alveoli, or air sacs.
What is breathing in called what is breathing out called?
Respiration is the act of breathing in and breathing out. When you inhale, you take in oxygen. When you exhale, you give off carbon dioxide.
Which gas is formed during respiration?
Animals and plants need oxygen. When an animal breathes, it takes in oxygen gas and releases carbon dioxide gas into the atmosphere. This carbon dioxide is a waste product produced by the animal’s cells during cellular respiration.
What controls flow of air into lungs?
The most important muscle of inhalation is the diaphragm. Found beneath the lungs, the diaphragm is a dome-shaped muscle. When this muscle gets tighter (contracts), it flattens and the lungs increase in size. This sucks air down into your lungs.
What gas is removed by the lungs?
Once in the lungs, oxygen is moved into the bloodstream and carried through your body. At each cell in your body, oxygen is exchanged for a waste gas called carbon dioxide. Your bloodstream then carries this waste gas back to the lungs where it is removed from the bloodstream and then exhaled.
How can we obtain different gases from air?
If we want oxygen gas from air, we have to separate out all the other gases present in the air. The air is compressed by increasing the pressure and is then cooled by decreasing the temperature to get liquid air.
How are gas molecules and gas flow described?
In this type of gas flow the mean free path of the gas molecules is less than the diameter of the pipeline or chamber or even section of the chamber where the molecules are flowing. As long as the gas molecules are colliding with each other more frequently than with the surfaces they are close to, they are said to be in viscous flow conditions.
What happens to gas molecules when they collide with each other?
When the mean free path of the gas molecules becomes longer than the diameter of the piping, or component, the gas flow changes into molecular flow and does not actually flow any more. At this point the molecules of gas collide with the inner surfaces of the piping or chamber more often than they collide with another gas molecule.
How are gas flowrates different from liquid flowrates?
Liquid is primarily measured in terms of volumetric flowrate, while gas is a mass-flow measurement because of the unique properties of gases when compared to liquids. While some volumetric technologies can measure gas flowrates, there can be problems with totalized flow.