There are 3 major parts of the respiratory system: the airway, the lungs, and the muscles of respiration. The airway, which includes the nose, mouth, pharynx, larynx, trachea, bronchi, and bronchioles, carries air between the lungs and the body's exterior.
Stable elements are those which have atleast one isotope with no tendency to "decay", i.e., change into anotherelement.
Can we have a picture of what u need
