1.The breathing system allows oxygen to diffuse into the blood and carbon dioxide to diffuse out of the blood. 2.The breathing system includes ribs, diaphragm,

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1.The breathing system allows oxygen to diffuse into the blood and carbon dioxide to diffuse out of the blood. 2.The breathing system includes ribs, diaphragm, lungs, trachea, bronchi, bronchioles and alveoli 3.Inhalation and exhalation involves the rib cage and the diaphragm The Lungs and Breathing

The Lungs

Breathing Breathing

Breathing

Breathing

1.Gaseous exchange takes place in the alveoli 2.Oxygen enters the blood, Carbon Dioxide leaves the blood 3.Alveoli are adapted to allow maximum gaseous exchange to take place Alveoli Alveoli

Alveoli

Alveoli

Cilia and Mucus 1.Mucus membranes and cilia in the respiratory system protect the body from infection 2.Chemicals in tobacco smoke may cause heart or lung disease 3.Tobacco smoke inhibits the action of cilia Cilia and Mucus

Tobacco smoke Tobacco Smoke

Damage to cilia by tar

Carbon Monoxide poisoning

Smoking apparatus Breathing

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