Main parts of the human respiratory system include the mouth, nasal cavity, lungs, bronchial tubes, diaphragm and trachea, according to National Heart, Lung, and Blood Institute. Other facets of the respiratory system are the larynx, epiglottis, alveoli and the blood vessels that carry oxygen away from the lungs.Continue Reading
Air passes through the mouth, nasal cavity, larynx, trachea and bronchial tubes before reaching the lungs. The NHLBI explains the mouth and nose moisten the air before reaching further into the respiratory system. The epiglottis separates the trachea from the esophagus, and the flap of skin prevents food and drink from entering the lungs. The trachea, or windpipe, splits into two bronchial tubes that each go into a lung. Healthline explains the upper respiratory tract is located outside the chest cavity, and the lower respiratory tract are parts of the system lower than the larynx.
The diaphragm is a powerful muscle below the lungs that expands and collapses the organs when humans inhale and exhale. The NHLBI reveals the diaphragm is the main muscle used for breathing. Other breathing muscles line the ribs and collarbone. The respiratory system works by exchanging oxygen and carbon dioxide at the cellular level inside tiny alveoli. The aveloli are round air sacs at the end of tiny air tubes called bronchioles. Bronchioles are small airways that branch off from the bronchial tubes that go into each lung, according to the NHLBI.Learn more about Human Anatomy
The internal nares serve as a filter for the respiration system, keeping particles from making it into the trachea and the lungs. In addition to cleaning out the air, the internal nares also provide warmth and moisture to the air as it makes its way to the lungs.Full Answer >
In the respiratory system, gas exchange occurs between the alveoli in the lungs and the capillaries. Alveoli are small cavities lined with thin membranes. The cavities expand and contract as a person breathes. Humans have approximately 300 million alveoli in their lungs, advises Eastern Kentucky University.Full Answer >
Bronchiectasis is a condition in which mucus cannot be efficiently cleared out of the lungs causing the airways to become stretched and widened, according to the National Heart, Lung, and Blood Institute. The excess mucus allows bacteria to grow and leads to chronic infections, further damaging the lungs.Full Answer >
Blood that reaches the lungs travels throughout a network of small blood vessels, where oxygen moves into the blood and carbon dioxide moves out of the blood, according to the National Heart, Lung and Blood Institute. This oxygen-rich blood is transported through the pulmonary veins and back to the heart, where it is pumped out to the rest of the body.Full Answer >