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Breathing is the process of inhalation and exhalation of air in and out of the lungs. Oxygen can carried out through gills. It is a part physiological respiration, essential for life. It receives oxygen and removes carbon dioxide from the body and other important process carried out is circulating the blood throughout the body.
It is a useful tool for achieving a relaxed and clear state of mind. Two types of physical movements associated with the gaseous exchange. They are: Inspiration or inhalation and Expiration or exhalation. The breathing mechanism involves the action of the respiratory muscles, which causes air to move into and out of the lungs. Moving air into the lungs is known as inhalation, or inspiration, and moving air out is called exhalation, or expiration. The main muscles involved in the movements of breathing are the diaphragm, the large muscle which forms the floor of the chest cavity, and the intercostal muscles, which are attached to the ribs.
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