The human respiratory system is a huge network of tissues and organs that makes breathing effortless. The respiratory system helps in the assimilation of oxygen from the air. It keeps a check on waste gases such as Co2 from blood. There are some common problems associated with the respiratory system, including allergies, diseases, and infections. Few pulmonary function tests are recommended by the doctor such as spirometry. A spirometer is a device that suggests how you inhale and exhale.
