Respiratory System Grade 10 Biology - PDF

Biology grade 10 Respiration in living things Human pulmonary respiration  What is respiration? Breathing is the process that allows the exchange of gases between an organism and its environment which ensures the supply of oxygen and the elimination of carbon dioxide  Nasa...

Biology grade 10 Respiration in living things Human pulmonary respiration  What is respiration? Breathing is the process that allows the exchange of gases between an organism and its environment which ensures the supply of oxygen and the elimination of carbon dioxide  Nasal Respi cavitie s Mouth Pharynx Larynx ratory Trache a syste Bronc hi Bronchiole s Alveolar m Lungs sacs Diaphrag m How does air enter and exit the body? Inhalation Exhalation What is the pathway of the inhaled and the exhaled air?  Pathway of the inhaled air Nasal caviti Phar es/ mout ynx Inhaled air h Trac Lar hea nx Bron Bron chiol chi es Alve olar Pathway of the exhaled air Alve Bron olar chiol sacs es Trac Bro hea ch Lary Phar nx ynx Mout h Composition of inhaled and exhaled air Nitrogen 78 mL Nitrogen 78 mL Inhaled air Oxygen 21 mL Exhaled air Oxygen 17 mL Carbon dioxide 0.O3 Carbon dioxide 4 mL mL What is the reason behind these differences? Gas exchange Conclusion The oxygen diffuses (passes) The oxygen diffuses (passes) from the alveolar air to the from the blood to the alveolar blood and carbon dioxide air and the carbon dioxide diffuses from the blood to the diffuses from the alveolar air to alveolar air. the blood. Summar The respiratory system is y responsible for the pulmonary respiration in human, absorbing of O2 and the elimination of CO2 The respiratory movements, inhalation and exhalation, allow the renewal of air in the lungs. Gas exchange happens at the level of alveoli, oxygen diffuses from the lungs to the blood and carbon dioxide diffuses from the blood to the lungs. Thank you Mrs. Rola al achkar