Question | Answer |
Function of the human respiratory system. | To exchange gases between the blood and the external environment. |
Sends a signal to control breathing rate. | Medulla. |
True or False: The medulla sends a signal to increase breathing rate when there are high levels of oxygen in the body. | False, when there are high levels of carbon dioxide in the blood. |
What does breathing do? | Moves air into and out of the lungs. |
Ribs move up and out, diaphragm moves down. | Inhalation. |
Ribs drop, muscles relax, and the diaphragm moves up. | Exhalation. |
Lungs. | Principle respiratory organs of the human body, elastic, secretes moisture through the pleural membrane. |
Another name for the nose. | Nasal cavity. |
True or False: Air entering the nose is filtered, warmed, and moistened. | True. |
Mucus. | Sticky fluid that traps bacteria, dust, and other particles in the air. |
Another word for the throat. | Pharynx. |
Passageway for air as it passes to the trachea. | Pharynx. |
Voice box, contains the vocal chords whose vibrations make speech possible. | Larynx. |
The epiglottis is a flap of tissue that covers the opening of the _____________ during the act of swallowing to prevent food from entering the lungs. | Larynx. |
Windpipe that connects the pharynx to the bronchi, which is made up of cartilaginous rings, lined with cilia and mucus. | Trachea. |
Connects the trachea with the bronchioles. | Bronchi. |
Cartilage-ringed tubes, connect the bronchi with the alveoli. | Bronchioles. |
Functional units for respiration in the lungs. | Alveoli. |
Another term for lungs. | Air sacs. |
Severe allergic reaction in which the contraction of the bronchioles makes breathing difficult. | Asthma. |
Inflammation of the linings of the bronchial tubes. | Bronchitis. |
Lung disorder in which the walls of the air sacs break down and there is less respiratory surface in the lungs. | Emphysema. |
Disease in which tumors form in the lungs as a result of irregular and uncontrolled cell division. | Lung cancer. |
Tumor. | Masses of tissue. |
Condition in which the alveoli become filled with fluid, preventing the exchange of gases in the lungs. | Pneumonia. |