2) Breathing is the movement of air into the lungs through the organs such as the mouth or nose. The internal air from the langs is released into the environment through the coordination of the intercostal muscles or ribs muscles and diaphragm. Each breathing cycle involves two phases:
2.1) Inhalation: When one inhales or breathes in, the intercostal muscles contract, and the ribs move upward. At the same time, the diaphragm contracts and move downward, increasing the volume of thoracic cavity (chest cavity). As a result, pressure inside the thoracic cavity become lower, and air is breathed into the lungs.
2) Breathing is the movement of air into the lungs through the organs such as the mouth or nose. The internal air from the langs is released into the environment through the coordination of the intercostal muscles or ribs muscles and diaphragm. Each breathing cycle involves two phases: 2.1) Inhalation: When one inhales or breathes in, the intercostal muscles contract, and the ribs move upward. At the same time, the diaphragm contracts and move downward, increasing the volume of thoracic cavity (chest cavity). As a result, pressure inside the thoracic cavity become lower, and air is breathed into the lungs.
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