I'm not exactly sure what you're asking, so I'll answer this two ways.
oxygen is used in our bodies at a cellular level. It is used and carbon dioxide is a byproduct of its function. Oxygen is carried in the blood stream on your red blood cells on a transport car called hemoglobin. This allows for the oxygen to get to the cells that need it. When the carbon dioxide is produced, it is released into the blood stream. Our bodies know when there is more carbon dioxide because it is acidic in the blood, allowing for our body to increase our respirations and breathe off the carbon dioxide (co2)---for our bodies to do this, this of veins as walls of a house, and the walls keep in the CO2. On the outside of the house is the air, like our lungs, so a door needs to be opened to allow the CO2 to be transferred across. There are tiny little spaces between each cell we have, and the ones in the lungs allow for oxygen and carbon dioxide to cross (the doorways).
When we're sick with a bad cough, with a chest infection, the doorways can be plugged with the mucous and cause problems with how the oxygen and c02 cross from the blood to the lungs, and the feeling that we cannot breath. (this on top of a few other things)
Hope that made sense!
Venous blood is loaded with carbon dioxide and low in oxygen Arterial blood is rich in oxygen with little carbon dioxide
The respiratory system is responsible for transferring gases (oxygen and carbon dioxide) into and out of the blood. This process occurs in the lungs where oxygen is taken in and carbon dioxide is released.
Oxygen and carbon dioxide are exchanged across the lining of a frog's mouth. Oxygen is absorbed from the air into the blood vessels, while carbon dioxide is released into the air from the blood vessels.
Oxygen is carried in the blood by attaching to hemoglobin molecules in red blood cells. When the blood reaches cells that need oxygen, it is released from hemoglobin and diffuses into the cells. Carbon dioxide is mainly transported in the blood as bicarbonate ions, which are formed when carbon dioxide reacts with water in red blood cells.
It is carbon dioxide which is collected from different organs of the body by blood
Oxygen is entered through the mouth and carbon dioxide is released out of the mouth.
Oxygen is absorbed, and Carbon Dioxide is released.
Venous blood is loaded with carbon dioxide and low in oxygen Arterial blood is rich in oxygen with little carbon dioxide
Deoxygenated blood is low in oxygen and high in carbon dioxide.
Oxygen is brought into the blood, and carbon dioxide released from the blood, at the alveoli of the lungs. Gases diffuse across the alveolar membrane to enter or leave the blood.
The lung takes carbon dioxide out of your blood and replaces it with oxygen.
The mechanisms for transporting oxygen and carbon dioxide in the blood are the lungs. The blood vessels are also needed for transporting oxygen and dispelling carbon dioxide.
The lungs are the organs responsible for carrying oxygen into the bloodstream and removing carbon dioxide from the body. Oxygen is absorbed into the blood in the lungs and then transported to the rest of the body, while carbon dioxide is released from the blood into the lungs to be exhaled.
In lungs where carbon dioxide is released and oxygen absorbed and in cells where oxygen is given to cells and carbon dioxide is absorbed by blood.
The respiratory system removes carbon dioxide from the blood and brings oxygen into the blood. This process occurs through the lungs, where oxygen from the air is exchanged for carbon dioxide in the blood.
The respiratory system is responsible for transferring gases (oxygen and carbon dioxide) into and out of the blood. This process occurs in the lungs where oxygen is taken in and carbon dioxide is released.
As blood moves through the lungs, oxygen is exchanged for carbon dioxide. Oxygen diffuses from the air in the lungs into the blood, increasing the oxygen level in the blood. Conversely, carbon dioxide diffuses from the blood into the air in the lungs, decreasing the carbon dioxide level in the blood.