Väljahingatav

Väljahingatav refers to the exhalation phase of breathing. It is the process by which air is expelled from the lungs. This expulsion of air is a crucial part of respiration, the process by which living organisms exchange gases with their environment. During exhalation, the diaphragm relaxes, and the intercostal muscles decrease the volume of the chest cavity. This reduction in volume increases the pressure within the lungs, forcing air outwards.

The air expelled during exhalation is rich in carbon dioxide, a waste product of cellular respiration, and also contains water vapor and other trace gases. The composition of exhaled air differs significantly from inhaled air, which is primarily composed of nitrogen and oxygen. The rate and depth of exhalation can vary depending on physiological needs, such as during physical activity when more carbon dioxide needs to be removed. Involuntary exhalation is controlled by the respiratory centers in the brainstem, while voluntary control is also possible, allowing for actions like speaking, singing, or sighing. The act of väljahingatav is essential for maintaining the body's gas balance and overall metabolic function.