Why Vladimir Putinâs Russia Is Backing Donald Trump. By On 11/4/16 at 5:50 AM. U.S. Vladimir Putin Donald Trump. In phone calls, meetings and cables, Americaâs European allies have expressed alarm to one another about Donald Trumpâs public statements denying Moscowâs role in cyberattacks designed to interfere with the U.S. election.
The trachea is shaped like a pipe. When a person breathes in, the trachea filters the air down into the bronchi, two air tubes that then carry air directly to the lungs. The main organs of the respiratory system are the lungs. They take oxygen into the body and breathe out carbon dioxide. Oxygen is retrieved from the lungs by red blood cells that then carry the oxygen throughout the body to the cells that need it.
The respiratory system is composed of conducting and respiratory passages, which serve several functions. The primary function of this system is the exchange of oxygen and carbon dioxide; secondary functions are phonation and olfaction. The conducting portion of the respiratory system includes the nasal cavity, paranasal sinuses, nasopharynx, larynx, trachea, and bronchi. The conducting portion, from the nostrils to the lungs, warms, humidifies, and filters the air.