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Respiratory System Respiratory System • Defn: Brings oxygen into the body and removes carbon dioxide and other gases. Parts of the Respiratory System • Nasal Cavity – Where • • • air enters the body Mouth – Where air enters the body Pharynx – Another name for the throat cavity Larynx – Voice Box Parts of the Respiratory System • Epiglottis – The flap of skin that covers the trachea. • Trachea – Directs air into the lungs. Parts of the Respiratory System • Bronchi – Passages through which air enters the lungs • Lungs – Transfer oxygen into the blood and remove carbon dioxide from the lungs Parts of the Respiratory System •Pleura – The outer lining of the lungs Parts of the Respiratory System • Diaphragm – A large dome shaped muscle that separates the lungs from the abdomen Parts of the Respiratory System • Bronchial tubes – Tubes running from the trachea to the lungs Parts of the Respiratory System • Alveoli – Tiny air sacs in the lungs Problems of the Respiratory System • Flu / Colds: Caused by a virus; cough, runny nose, aches fever • Tuberculosis: Bacterial lung infection • Allergies: Sneezing, itchy eyes, runny nose, hives; caused by a reaction to a substance • Pneumonia: Lung infection by bacteria or viruses; fever, chest pain, difficulty breathing Problems of the Respiratory System • Bronchitis: Swelling of the bronchi due to infection; cough fever, tightness in chest • Asthma: Bronchial swelling and blockage; wheezing, short breath, coughing • Lung Cancer: Alveoli destroyed; often caused by smoking • Emphysema: Alveoli destroyed; extreme difficulty breathing; often fatal