The trachea, bronchi and bronchioles form the tracheobronchial tree â a system of airways that allow passage of air into the lungs, where gas exchange occurs.he trachea marks the beginning of the tracheobronchial tree. It arises at the lower border of cricoid cartilage in the neck, as a continuation of the larynx. By Bibi Saint-Pol [CC BY-SA 3.0], via Wikimedia Commons. Fig 1.0 â Overview of the tracheobronchial tree.
While relative masses are nice if you want to compare protons, neutrons and electrons to one another, it doesn't tell you what the actual masses of these particles are. In kilograms, the masses are: Neutron = 1.6749286*10-27 kg.
The mass of a neutron is slightly greater than the mass of a proton. The neutron has no electric charge while the proton has a positive charge (+1 elementary charge). The ma â¦ ss of a neutron and a proton are 1.67492729(28)Ã10â27 kilograms and 1.672621637(83)Ã10â27 kilograms respectively.he mass of the neutron is 1.67493 x 10-27 kg. The elementary charge is equal to 1.60218 x 10-19 Coulombs. The proton and electron each carry this charge, but the sign of the charge will be positive for the proton, and negative for the electron.