18.1 The Respiratory System Name: What are the two main functions of the respiratory system? 1 2 Respiration: Breathing: How many times a day do you breath? What percentage of air is made up of oxygen? As air travels from the outside environment to the lungs it goes through the following organs: Nose, pharynx, trachea, and bronchi. Define each organ and describe its function. Nose: Pharynx: Trachea: Bronchi: What is the main organ of the respiratory system? Alveoli: Diaphragm: Larynx: Vocal Cords: Which type of vocal cords have high tones? Which type of vocal cords have low tones?
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