REA-Crossword Puzzle Clues. Search through millions of crossword puzzle answers to find crossword clues with the answer REA. Type the crossword puzzle answer, not the clue, below. Optionally, type any part of the clue in the Contains box.Click on clues to find other crossword answers with the same clue or find answers for the REA crossword clue.earch through millions of crossword puzzle answers to find crossword clues with the answer REA. Type the crossword puzzle answer, not the clue, below.
Eventually, the bronchi become known as bronchioles â the smallest air tubes in the lungs. This system of air tubes can be thought of as an upside down tree, with the trachea being the main trunk and the bronchi and bronchioles being the branches. The medical term for all the air tubes is 'the respiratory tract'.
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.