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The Respiratory System. Purpose of the respiratory system. To provide a constant supply of oxygen to keep your body cells functioning To remove carbon dioxide from the body cells. Organs of the respiratory system. Trachea Bronchus (bronchi) Bronchioles Alveoli Pleura Diaphragm.
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Purpose of the respiratory system • To provide a constant supply of oxygen to keep your body cells functioning • To remove carbon dioxide from the body cells
Organs of the respiratory system • Trachea • Bronchus (bronchi) • Bronchioles • Alveoli • Pleura • Diaphragm • Nose / mouth • Nasal cavity • Pharynx • Epiglottis • Larynx • Trachea Lungs
Mouth & Nose • Brings air into the body • Nasal hairs in nostrils trap dust
Nasal cavity • Warms & moistens air
Pharynx • Tube-like passageway used by food, liquid, and air • At the lower end of the pharynx is a flap of tissue called the epiglottis • covers the trachea during swallowing so that food does not enter the lungs
Larynx • “Voice box” • The airway to which two pairs of horizontal folds of tissue, called vocal cords, are attached
Trachea • Air-conducting tube • Connects the larynx with the bronchi
Bronchi • Two short tubes that branch off the lower end of the trachea • Carry air into the lungs. • Also called as bronchus
Bronchioles • Tiny branches of air tubes in the lungs • Connect bronchi to alveoli
Alveoli • Tiny, thin-walled, grapelike clusters at the end of each bronchiole • Surrounded by capillaries • Where carbon dioxide and oxygen exchange take place • Also called alveolus
Pleura • Membrane lining the lungs and chest cavity
Diaphragm • Muscle wall between the chest and the abdomen that the body uses for breathing
