Hemoglobin's primary role is to act as a two-way respiratory carrier. This means it transports oxygen from the lungs to the body's tissues and simultaneously helps carry carbon dioxide back to the lungs for exhalation. This crucial function is vital for the body's oxygen supply and carbon dioxide removal.
Hemoglobin's Function in Detail:
- Oxygen Transport: In the arteries (oxygen-rich blood), hemoglobin has a high affinity for oxygen, readily binding to it in the lungs and releasing it in tissues that need it.
- Carbon Dioxide Transport: In the veins (oxygen-poor blood), hemoglobin's affinity for carbon dioxide increases, facilitating its transport back to the lungs. This process also involves other molecules, like hydrogen and chloride ions. The affinity for these molecules is low in the arterial circulation.
The provided references touch on various rules and regulations, but none directly define a "rule of hemoglobin." The references discuss things like blood donation eligibility requirements, legislative bills, and transfusion thresholds – all indirectly related to hemoglobin levels but not defining a specific "rule." For example, the reference mentioning the "10/30 rule" discusses RBC transfusion based on hemoglobin levels, but this is a clinical guideline, not a fundamental rule governing hemoglobin itself.
