Carbon monoxide will replace, and displace, oxygen on hemoglobin. This is why carbon monoxide poisoning is so dangerous as the tissues slowly lose access to oxygen.
Your lungs refine oxygen from the other gases in air because the gases diffuse through the cell walls in the alveoli in your lungs through osmosis (higher concentration of gases in the air than in the blood, so gases move from the higher concentration to the lower concentration) where they contact the red blood cells. The hemoglobin in the red blood cells binds to the oxygen and leaves all the other gases alone. It moves on from the lungs and delivers the oxygen to the rest of the body. It's the hemoglobin that does the work.
Red blood cells contain hemoglobin, a protein that binds to oxygen. Hemoglobin has iron ions that attract oxygen molecules and form a reversible bond with them. This allows red blood cells to transport oxygen from the lungs to tissues throughout the body.
Oxygen and carbon monoxide
Gases are carried around the body by the circulatory system. Oxygen is transported in the blood by binding to hemoglobin in red blood cells, while carbon dioxide is carried back to the lungs to be exhaled. The cardiovascular system ensures that gases are delivered to tissues and organs where they are needed.
Hemoglobin is found in blood, or more specifically red blood cells. It is used there to transport gases (oxygen, carbon dioxide, etc.) throughout the body.
Other than as free gases in the lungs, gases are either dissolved in the blood plasma or absorbed by the protein hemoglobin found in red blood cells. Hemoglobin mostly absorbs oxygen, carbon monoxide, or carbon dioxide and carries these gases between the cells and the lungs. Nitrogen gas dissolves in blood plasma and body tissues, and is also a metabolic byproduct (as urea).
ABG (Arterial Blood Gases) is a measurement of oxygen saturation in the arterial blood which supplies oxygenated blood to the body tissue and the extraction of oxygen from the hemoglobin at the capillary level. The amount of oxygen saturation of the hemoglobin (HbO2) depends on hemoglobin concentration and the arterial pressure often referred to as Hemoglobin / O2 dissociation curve. At lower body temperature, less oxygen is bounded to hemoglobin, while at higher temperature slightly more oxygen is bounded to hemoglobin. It is therefore important to know the body temperature when the ABG analysis is done so as to have a more meaningful interpretation of the result.
Gases such as oxygen and carbon dioxide are carried by the bloodstream. Oxygen is primarily transported by red blood cells through hemoglobin, while carbon dioxide is transported in the form of bicarbonate ion.
I do believe that the answer is erythrocytes. Erythrocytes are the formed element in blood that transport oxygen and carbon dioxide.
Unlike the other cells in your body red blood cells do not have DNA or a nucleus. They do contain hemoglobin, a protein which allows your red blood cells to carry oxygen and other gases.
Red blood cells are responsible for transporting oxygen from the lungs to all tissues in the body and carrying carbon dioxide back to the lungs for exhalation. They contain hemoglobin, a protein that binds to oxygen and helps facilitate gas exchange in the body.
Oxygen is inhaled into the lungs and diffuses into red blood cells in the capillaries, where it binds to hemoglobin. Carbon dioxide is released from red blood cells into the lungs and exhaled out of the body. This exchange of gases occurs through the process of respiration.