diaphragmatic breathing. abdominal, belly or deep breathing

diaphragmatic breathing abdominal belly deep inhale exhale side view human body diaphragm lungs cavity isolated technique diagram labeled education scheme anatomical movement position vector respiratory stress reduction mind rate pulmonary oxygenation exercises pranayama meditation health depression copd asthma scientific healthy medical science biology exam knowledge lesson explainer biochemistry quiz instruction learning training schooling teaching coaching breathing belly exhale white background