Functions of the respiratory System
The respiratory system performs several vital functions within the human body to support the circulation of blood.
The inhaled oxygen binds to hemoglobin in red blood cells and is transported to all cells and tissues in the body.
Carbon dioxide Removal
Carbon dioxide is transported in the bloodstream back to the lungs and from there, it is expelled from the body during exhalation.
The body can control how much carbon dioxide is released by altering the rate and depth of breathing, which aids in keeping the pH within a specific, healthy range.
Filtering and Humidifying Air
The respiratory system filters away particle matter, dust, and infections from the air that is inhaled, keeping these things from getting to the sensitive lung tissue. It also humidifies the air,, adding moisture to the air to humidify it and keep the respiratory passages from drying up.
The respiratory system can aid in thermoregulation in cold conditions by warming the air before it enters the lungs, which helps to maintain the body's core temperature.
Sense of Smell
When you inhale through your nose, odor molecules in the air are detected by olfactory receptors in the nasal passages.
The respiratory system indirectly affects metabolism by supplying oxygen for cellular respiration.